Attachment_3_PB-X_draft_Specification_11-9-16.doc
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- N00024-17-R-2209
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FY17 CRF PB-X Specification 9 November 2016
NAVAL EXPEDITIONARY COMBAT COMMAND
Coastal Riverine Force (CRF)
PATROL BOAT X (PB-X)
SPECIFICATION
REV. DRAFT
9 November 2016 Rev. DRAFT
REVISION HISTORY
| Date |
| Summary Of Change |
| Version |
| 11/5/2016 |
| DRAFT |
| - |
ATTENTION:
This is the draft Specification Attachment for the Patrol Boat replacement (PB-X) (N00024-17-R-2209). This Draft Specification Attachment is for planning purposes only and shall not be construed as an invitation for bid, request for quotation, request for proposal, or as an obligation on the part of the Government to acquire any products or services. No entitlement to payment of direct or indirect costs or charges by the Government will arise as a result of contractor responses to this announcement. This request does not constitute a solicitation for proposals or the authority to enter into negotiations to award a contract. When and if the Government issues the final RFP, interested contractors will be expected to thoroughly address the requirements thereof regardless of the circumstances surrounding this draft Specification Attachment.
TABLE OF CONTENTS
9SECTION 0: GENERAL GUIDANCE AND ADMINISTRATION
9040 INTRODUCTION AND GENERAL DESCRIPTION
9040-1 Definitions
9042 GENERAL ADMINISTRATIVE REQUIREMENTS
9042-1 Mission Description
10042-2 General Requirements
10042-3 Statement of Work
10042-4 Referenced Documents
12042-4 Alternate Items
13050 CRAFT PERFORMANCE
13050-1 Craft Performance Thresholds
14050-2 Craft Performance Objectives
14070 GENERAL REQUIREMENTS FOR DESIGN AND CONSTRUCTION
14070-1 Environmental Conditions
14070-2 Load Conditions
15070-3 Seakeeping, Dynamic Stability and Maneuverability
15070-4 American Boat and Yacht Council (ABYC) Standards
15070-5 Alterations
15070-6 Equipment Installation
16071 ACCESS
16071-1 Accessibility
16071-2 Bilge Access
17073 NOISE, VIBRATION, AND RESILIENT MOUNTINGS
17073-1 Noise Levels
17073-2 Sound Attenuating Materials
17073-3 Resilient Mounts
17075 FASTENERS
17075-1 Stainless Steel Fasteners
17078 MATERIAL
17078-1 Structural Material/Aluminum
18078-2 Fiber Reinforced Plastic
18078-3 Bedding Compounds
18078-4 Non-Biodegradable Materials
18078-5 Fabric Material
18078-6 Interior Materials
18078-7 Other
19079 STABILITY
19079-1 Stability Requirements
19079-2 Flotation Foam
19079-3 List Limits
19084 TRANSPORTATION AND HANDLING
19084-1 Air Transport
20084-2 Road Transport
20084-3 Marine Transport, Launch and Recovery
20084-4 Boat Tiedowns
21Table 084-4.1. Tiedown Analysis Summary
22084-5 Tiedown Straps
22084-6 Trailer Highway
23SECTION 1: HULL STRUCTURE
23100 GENERAL REQUIREMENTS FOR HULL STRUCTURE
23100-1 General Structural Requirements
25100-2 Limber Holes
25130 HULL DECKS
25130-1 Deck Drains
25130-2 Watertight Decks and Hull
25150 DECK HOUSE STRUCTURES
25150-1 Hull Style/Cabin
26164 BALLISTIC PROTECTION (Dist. D – see addendum)
26167 HULL STRUCTURAL CLOSURES
26167-1 Doors and Hatches
26169 SPECIAL PURPOSE CLOSURES AND STRUCTURES
26169-1 Swim Platform
26169-2 Arch
26169-3 Aft Deck Overhead Canopy
27SECTION 2: PROPULSION
27233 INBOARD DIESELS
27233-1 Inboard Diesel Performance
27233-2 Starter
27233-3 Alternator
27236 SELF CONTAINED PROPULSION SYSTEMS
27236-1 Diagnostic Laptop
28241 PROPULSION REDUCTION GEARS
28241 Marine Transmission
28243 PROPULSION SHAFTING
28243 Driveshafts and Seals
28247 WATERJET PROPULSION
28247-1 Waterjet Propulsion
28252 PROPULSION CONTROL SYSTEM
28252-1 Propulsion Instrument Marine Package
28256 MACHINERY COOLING SYSTEMS
29256-1 Strainer
29259 ENGINE EXHAUST SYSTEMS
29259-1 Main Engine Exhaust (wet)
29259-2 Exhaust Risers
29262 MAIN PROPULSION LUBE OIL SYSTEM
29262-1 Electric Fast Lube Oil Change System (FLOCS)
29SECTION 3: ELECTRIC PLANT
29300 GENERAL REQUIREMENTS FOR ELECTRIC PLANT
29300-1 Suitable for Marine Environment
30300-2 Panel Covers
30300-3 Switches
30300-4 Bonding System
30303 PROTECTIVE DEVICES
30303-1 DC Overcurrent Protection
30303-2 AC Overcurrent Protection
31304 ELECTRICAL CABLE, WIRING, AND CONNECTIONS
31304-1 Watertight Connections
31304-2 Cable Supports
31304-3 Marine Multi-Conductor Cable
31304-4 Electrical Connections
32304-5 Weatherproofed Connectors
32304-6 Watertight Cable Penetrations
32304-7 Cableways
32304-8 Ignition Protection
32313 BATTERIES
32313-1 Batteries
32313-2 Battery Charging (Alternator)
33313-3 Battery Voltmeter
33313-4 Shore Power Battery Charger
33313-5 120 Vac Inverter
33320 POWER DISTRIBUTION SYSTEMS
33320-1 DC Power Distribution System
33320-2 AC Power Distribution System
33320-3 Outlets (12 Vdc)
34320-4 Outlets (120 Vac GFCI)
34320-5 Shore Power System
34324 SWITCHGEAR AND PANELS
34324-1 Electrical Circuit Breaker Panels
34330 LIGHTING
34330-1 Electronics Dimmer
35330-2 NVIS Compatible Lighting
35330-3 Interior LED Lighting
35330-4 Deck Work Lights
35330-5 Handheld Spotlight
35330-6 Fixed Spotlight
35SECTION 4: COMMAND AND CONTROL
35400 COMMAND AND SURVEILLANCE, GENERAL
35400-1 Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance (C4ISR) Systems
36400-2 Communications Rack and Power Provisions
36405 ANTENNA REQUIREMENTS
36405-1 Antennas
36420 NAVIGATION SYSTEMS
36420-1 Electronic Chart Display and Information System (ECDIS)
37420-2 Integrated Electronic Navigation System
37421 NON-ELECTRICAL/ELECTRONIC NAVIGATION AIDS
37421-1 Magnetic Compass
37421-2 Storage
37422 ELECTRICAL NAVIGATION AIDS
37422-1 Navigation Lights
37422-2 Defense Advanced GPS Receiver (DAGR)
38422-3 Day Shape Mast
38430 INTERIOR COMMUNICATIONS
38430-1 Vehicle Intercom (AN/VIC-5)
38441 RADIO SYSTEMS
38441-1 Commercial Marine Band Radio (Standard Horizons GX5500S)
38441-2 Multi Band Mobile Radio (Motorola APX 7500)
39441-3 SATCOM Radio System (Harris RF-300M-V250)
39441-4 HF/VHF Radio system (AN/PRC-170)
39443 VISIBLE AND AUDIBLE COMMUNICATION SYSTEMS
39443-1 Navigation Horn
39443-2 Law Enforcement Hailer/Siren System
39443-3 Law Enforcement Light Kit
39443-4 Infrared (IR) Strobelight
40450 SURVEILLANCE SYSTEMS
40450-1 Cobra Enhanced Blue Force Tracking (CEBT)
40450-2 Automatic Identification System (AIS)
40450-3 Electro-Optical/Infrared (EO/IR) Imaging System:
40450-4 Video Distribution System
40470 COUNTERMEASURE SYSTEMS
40470-1 Long Range Hailing Device Provisions
40SECTION 5: AUXILIARY SYSTEMS
40500 GENERAL REQUIREMENTS FOR AUXILIARY SYSTEMS
40500-1 Mechanical Components
41500-2 Through-Hull Fittings and Valves
41500-3 Fluid Systems Connections
41505 HOSES
41505-1 Piping and Hose Materials
41505-2 Pipe and Hose Installation
42505-3 Hose Clamps
42512 HEATING, VENTILATION, AND AIR CONDITIONING (HVAC)
42512-1 Defogging System
42512-2 Cabin Fans
42512-3 Engine Room/Machinery Room Ventilation
42512-4 Heavy Duty Cabin Heat and Air Conditioning
43529 BILGE/DRAINAGE SYSTEM
43529-1 Emergency Engine Space Dewatering System
43529-2 Portable Manual Bilge Pump
43529-3 Electric Bilge Pump(s)
43541 FUEL SYSTEM
43541-1 General Requirements
43541-2 Fuel Tank
44541-3 Fuel Sounding
44541-4 Fuel Level Gauge
44541-5 Fuel Valves
44541-6 Remote Fuel Shutoff
44541-7 Fuel/Water Separator and Filter
44541-8 Fuel Stripping Pump
44555 FIRE FIGHTING
44555-1 Engine Room Fixed, Clean Agent Fire Extinguishing System
45555-2 Portable Fire Extinguishers
45556 HYDRAULIC FLUID SYSTEM, CENTRALIZED
45556-1 Hydraulics
45561 STEERING CONTROL SYSTEMS
45561-1 Hydraulic Steering
45565 TRIM AND HEEL CONTROL SYSTEMS
45565-1 Trim and Heel Control
46581 ANCHOR HANDLING
46581-1 Anchor Fittings
46581-2 Fortress Anchor
46582 MOORING AND TOWING
46582-1 Tow Provisions
46582-2 Bow Eye
47582-3 Towing Hawser
47582-4 Cleats
47593 SEWAGE CONTROL SYSTEMS
47593-1 Portable Toilet
47SECTION 6: OUTFIT AND FURNISHINGS
47600 OUTFIT
47600-1 Onboard Spares
47600-2 Boat Hook
47600-3 Ring Buoy
47600-4 U.S. Flag
47600-5 Mooring Lines
47600-6 Fenders
48600-7 Air Horn
48600-8 First Aid Kit
48600-9 Emergency Positioning Indicating Radio Beacon (EPIRB)
48602 LABELING
48602-1 Hull Registry Number (HRN)
48602-2 Label Plates (General)
49602-3 Piping System Label Plates
49602-4 Valve Label Plates
49602-5 Instruction Label Plates
49602-6 Hoisting Label Plates
49602-7 Boat Information Label Plate
50602-8 Boat Alteration Label Plate
50602-9 Shipping Data Label Plate
50602-10 In-Service Label Plate
50602-11 Systems Label Plates
50602-12 Stowage Label Plates
50602-13 Unique Item Identification (UID)
50611 HULL FITTINGS
50611-1 Deck Cargo Tiedowns
50611-2 Heavy Duty Fendering
50611-3 Hoisting Fittings
51611-4 Hoisting Sling
52611-5 Hoisting Hardware
52612 RAILS, STANCHIONS, AND LIFELINES
52612-1 Grab Rails
52612-2 Aft Deck Hand Rails
52612-3 Life Lines
52625 WINDOWS
52625-1 Water Tight Windows
52625-2 Windshield Wiper/Washer System
52630 PRESERVATIVES AND COVERINGS
52630-1 Bottom Paint
52630-2 Draft Marks
53630-3 Topside Paint
53630-4 Anodes
53630-5 Exterior Non-Skid
53630-6 Anti-Fatigue Matting
53635 HULL INSULATION
53635-1 Thermal Insulation and Acoustical Treatment
53662 WORKING SPACES AND SEATING
53662-1 Seating-Crew
53662-2 Console Ergonomics
54662-3 Bow Gunner Station
54670 STOWAGE SPACES
54670-1 Stowage (General)
54670-2 Stowage (Crew Gear)
54670-3 Stowage (Misc)
55SECTION 7: ARMAMENT
55700 ARMAMENT
55700-1 Heavy Machine Gun Foundations
55700-2 Remote Weapons System Provisions
55700-3 Ready Service Ammunition Storage
55763 SMALL ARMS AND PYROTECHNIC STOWAGE
55763-1 Small Arms Stowage Locker
55763-2 M2HB Barrel Stowage
SECTION 0: GENERAL GUIDANCE AND ADMINISTRATION
040 INTRODUCTION AND GENERAL DESCRIPTION
040-1 Definitions
a. Idle Speed Idle speed shall be dictated by the idle speed of the engines.
b. Patrol Speed: Efficient displacement speed slightly before hump usually 10-12 knots (minimal wake).
c. Escort Speed: when conducting High Value Unit Transit Escort Operations boat speed will match the HVU, which can vary between 10-20 knots pending location and proximity to port.
d. Cruise Speed: Most fuel efficient planing speed greater than 25 kts.
e. Sprint Speed: Boat speed at 100% throttle setting (maximum engine RPM).
f. CONUS: inside the Continental United States.
g. OCONUS: Outside the Continental United States.
h. Threshold Requirement: minimum acceptable operational value below which the utility of the system becomes questionable.
i. Objective Requirement: the desired operational goal associated with a performance attribute beyond which any gain in utility does not warrant additional expenditure. Note: the only requirements with both Threshold and Objective values are Payload and Navigable Draft (see Section 050-2).
042 GENERAL ADMINISTRATIVE REQUIREMENTS
042-1 Mission Description
a. PB-X will operate day or night, in all-weather and will patrol green water littoral zones such as coastal water approaches, bays, major rivers, ports, and harbors. Ambient conditions will range from 10° to 125°F ambient air temperatures (28°- 95°F water temperatures). Specifically, the boat will support maritime security operation missions and tasks such as Harbor Approach Defense; High Value Unit Transit Escort Operations; Visit, Board, Search, and Seizure (VBSS) Operations and Overwatch; Critical Infrastructure Protection; Amphibious Operations Support; Riverine Operations; Mine Warfare Support; Embarked Forces Support (e.g., SOF, EOD, USCG LEDET); and, Humanitarian Assistance/Disaster Relief (HA/DR) Support. A mission objective is "presence and deterrence”.
b. PB-X shall have a 5 man crew including a coxswain, navigator, two (2) gunners and an engineer/gunner. Boat crew rotation shall typically occur 2 to 3 times during a 24- hour duty cycle period. Patrol missions will include short transits of less than 1-hour, 25 nautical miles (NM) from base to the Operational Area (OPAREA). While patrolling an OPAREA a boat may be required to loiter at very slow/idle to speeds of 5-8 knots and/or sprint at 35 knots to intercept a Contact of Interest (COI). Escort missions require the boat to match the speed of the High Value Unit, which is usually between 15 to 20 knots. Individual missions will typically be limited to a twelve (12) hour duration.
c. PB-X shall operate up to 3,000 hours a year when deployed OCONUS and 1,000 hours/year when stationed CONUS. Normal lifecycle maintenance and emergent equipment or systems repairs will be accomplished at their CONUS homeports, or in deployed locations OCONUS, as appropriate. Boats typically forward deploy for 3-4 year rotations before returning CONUS. Crews typically rotate every 6-8 months, training on boats CONUS then operating forward deployed boats. Given the high annual number of operational hours on the water, a simple, reliable and easy to maintain design is required.
d. PB-X will have two primary mission profiles defined as follows:
| Speed |
| Mission Profiles |
| Harbor Patrol |
| HVU Escort |
| Idle: |
| 82% |
| 56% |
| Patrol: |
| 11% |
| 19% |
| Cruise |
| 5% |
| 15% |
| Sprint: |
| 2% |
| 10% |
d. The Navy desires a visually intimidating topside arrangement that will create a daunting presence and impression on all observers. PB-X shall be easily and primarily identifiable as a military combatant craft and not as a standard harbor security boat or police boat.
042-2 General Requirements
a. This Specification is for a nominal forty (40) foot long, U.S. Navy Patrol Boat.
b. The mission duration is for up to twelve (12) hours.
c. The expected service life for the boat delivered under this Specification is fifteen (15) years. The service life may be extended for up to twenty (20) years with major overhauls including replacement of propulsion systems (engines, water jets), mechanical systems (fuel, bilge), electrical systems, collars/fendering, and cosmetic hull repair.
d. The Builder shall adhere to best marine practices. Specifications provide the minimum required general system characteristics and requirements for the selection; installation; onboard performance; onboard inspection of machinery, equipment, and outfit; and pre-installation handling and inspections of materials for construction.
042-3 Statement of Work This specification is written to be used in conjunction with the Statement of Work. Additional requirements such as training, testing, technical analyses, etc are defined in the Statement of Work.
042-4 Referenced Documents Unless otherwise stated all documents shall be the most current revisions at time of award.
a. ISO 2533:1975, “Standard Atmosphere”
b. NSWCCD-80-TR-2014/038, Weight Management Process Guidance for Boats and Craft
c. Blount, Donald L. Performance by Design. 2014
d. “Standards and Technical Information Reports for Small Craft”, American Boat and Yacht Council
e. MIL-SPEC MIL-R-24719, “Fire Retardant Resin”
f. FED-STD 595C, “Color Standards”
g. NAVSEACOMBATSYSENGSTA Report No. 6660-99 Rev. A, “Procedures Manual for Stability Analysis of U.S. Navy Small Craft”, 1988
h. MIL-STD-1366E, “DEPARTMENT OF DEFENSE: INTERFACE STANDARD FOR TRANSPORTABILITY CRITERIA”
i. MIL-STD-1791A,“Department of Defense Interface Standard: Designing for Internal Aerial Delivery in Fixed Wing Aircraft”
j. NSWCCD-23-TM-2009/64 Rev C, “ SMALL CRAFT TRANSPORTABILITY DESIGN AND CERTIFICATION PROCESS GUIDANCE”
k. 49 “CFR” 393.102 , “What are the minimum performance criteria for cargo securement devices and systems?”
l. WSTDA-T-1, “Recommended Standard Specification for Synthetic Web Tie Downs”
m. FMVSS 571.121. Web Sling & Tie Down Association
n. MIL-STD-209, “DEPARTMENT OF DEFENSE INTERFACE STANDARD FOR LIFTING AND TIEDOWN PROVISIONS”
o. 49 CFR 393, “Parts and Accessories Necessary for Safe Operation”
p. 49 CFR 571, “Federal Motor Vehicle Safety Standards”
q. ABS Guide for Building and Classing High Speed Naval Craft (HSNC)
r. ISO 12215-5, “Hull construction - Scantlings - Part 5: Design pressures for monuhulls, design stresses, scantlings determination”
s. ISO 12215-6, “Small craft — Hull construction and scantlings — Part 6: Structural arrangements and details”
t. MIL-STD-3009, “DEPARTMENT OF DEFENSE INTERFACE STANDARD: LIGHTING, AIRCRAFT, NIGHT VISION IMAGING SYSTEM (NVIS) COMPATIBLE”
u. NSWCCD-23-TM-2009/58, “U.S. Navy Boat Electrical Practices”
v. ASTM B33, “Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes”
w. MIL-DTL-24643, ”Cables, Electric, Low Smoke Halogen-Free, for Shipboard Use, General Specification for”
x. Convention on the International Regulations for Preventing Collisions at Sea, 1972 (COLREGs)
y. MIL-STD-461, “Requirements for the control of electromagnetic interface characteristics of subsystems and equipment”
z. NSWCCD-23-TM-2011/05, “U.S. Navy Craft Mechanical Practices”
aa. SAE J1273, “Recommended Practices for Hydraulic Hose Assemblies”
ab. NSWCCD-23-TM-2011/39, “Anchoring System Design and Verification Process Guidance”
ac. NSWCCD-23-TM-2009/65, “Towing Fitting Design and Certification Process Guidance”
ad. NSWCCD-23-TM-2011/38, “Mooring Fitting Design and Verification Process Guidance”
ae. MIL-STD-209K, “INTERFACE STANDARD FOR LIFTING AND TIEDOWN PROVISIONS”
af. NSWCCD-23-TM-2009/33, “Hoisting System Design and Certification Process Guidance”, Rev A
ag. MIL-PRF-24647D, “Paint System Anti-Corrosive Ship Hull”
ah. MIL-PRF-24667C, “Coating System, Non-skid, for Roll, Spray, or Self-Adhering Application”
ai. NSWCCD-80-TR-2015/010, “LABORATORY TEST REQUIREMENTS FOR MARINE SHOCK ISOLATION SEATS”
aj. MIL STD 1472, “Department of Defense Design Criteria: Human Engineering”
ak. ABCD-TR-15-001: Supplement, “High Speed Craft Human Factors Engineering Design Guide”
al. DoD HDBK 743, “Anthropometry U.S. Military Personnel”
am. ASTM F1166, “Standard Practice for Human Engineering Design for Marine Systems, Equipment, and Facilities”
an. Small Craft Crew Served Weapons Integration Guidance and Certification Process NSWCCD-23-TM-2009/63 042-4 Alternate Items
a. Where boat components and equipment are specified by brand name or manufacturer and model number and followed by “or equal”, such identification is intended to be descriptive, not restrictive, and is intended to indicate the required characteristics of the product. The Builder may propose the use of other products which are equal to the specified make and model products. The following general requirements shall form the basis for determining the equality of alternate products, unless additional specific, or alternate requirements are designated within the applicable sections of these Specifications:
i. The major attributes of form, fit, function, interface, and material of an alternate item shall not degrade the performance of the system within which it is used, nor the boat as a whole. The alternate item shall require no more space or volume than the designated item for installation, operation, or maintenance. The alternate item shall weigh no more than the designated item. The connection fittings required to incorporate the alternate item into a system shall be identical to those necessary to incorporate the specified item. The principles of operation of the alternate item shall be the same as those of the designated item (i.e., hydraulic cylinders shall not be used in lieu of springs, etc.). Input power, capacity, and other operating requirements for the alternate item shall be no greater than those required by the designated item. Output power, capacity, and other performance parameters of the alternate item shall be no less than those required for the designated item and not so much greater than those of the designated item as to require an increased capacity of the system within which the item is installed.
ii. The materials of construction of the alternate item shall be the same as those of the designated item unless the Builder can demonstrate to the Government that the proposed alternate material will not adversely affect performance or service life of the item, the system within which it is installed, or the boat as a whole.
iii. The reliability and maintainability of an alternate item shall be equal to or better than the specified item. The Builder shall provide evidence of the reliability and maintainability of the alternate item. This evidence may include such things as results of testing, service histories, documentation of successful use in similar applications, planned maintenance requirements, etc. Where the reliability and maintainability of the specified item has been established by testing, the Government may require that the alternate item undergo similar testing to demonstrate its reliability and maintainability. Such testing, if required, shall be at the Builder's expense.
iv. An alternate item shall conform to the same industry or Government specifications or standards as the specified item. Where a specified item has been approved or certified by a regulatory or testing agency, such as USCG or Underwriters' Laboratories, the alternate item shall also be approved or certified. The cost of demonstrating compliance with specifications or standards, or of obtaining approval or certification, shall be borne by the Builder.
v. If the specified item is one with established logistic support any alternative item shall have equivalent logistic support. If equivalent logistic support has not been established for the alternate item, the Builder shall bear the expense of establishing equivalent support. Logistic support shall include, as applicable: maintenance planning and analysis; training and training support, including training equipment, curricula, and instruction materials; supply support; support equipment such as special tools and test equipment; technical documentation including technical manuals, Product Technical Description (PTD), Planned Maintenance System (PMS), Technical Repair Standards (TRS), and software documentation; computer resource support; facilities for maintenance and training; unique packaging, handling, storage, and transportation requirements; and human engineering considerations.
050 CRAFT PERFORMANCE
050-1 Craft Performance Thresholds
a. Sprint Speed:
35 kts
b. Cruise Speed:
25 kts
c. Range: 200 NM
d. Speed and Range requirements shall be met in Calm Water, Full Load condition (Section 070-4), ISO Standard 2533:1975 “Standard Atmosphere” conditions. Range shall be evaluated at cruise speed.
e. Navigable Draft: less than 5 ft
f. Minimum Payload : 4,210 lbs
| Crew: 5 personnel at 285 pounds each |
| 1425 lbs. |
| Crew Served Weapons and Ammunition |
| 1,240 lbs. |
| Miscellaneous Payload |
| 500 lbs. |
| Remote Weapon System Reservation |
| 570 lbs. |
| Service Life Margin |
| 475 lbs. |
| Total Payload |
| 4,210 lbs. |
050-2 Craft Performance Objectives
a. Navigable Draft: Less than 3 ft
b. Minimum Payload: 5,350 lbs
i. Threshold Payload in 050-1 plus passengers: 4 personnel at 285 pounds each
070 GENERAL REQUIREMENTS FOR DESIGN AND CONSTRUCTION
070-1 Environmental Conditions
a. The boat shall be capable of operating in ambient air temperatures between ten (10) degrees Fahrenheit and one hundred and twenty-five (125) degrees Fahrenheit and water temperatures between twenty-eight (28) degrees Fahrenheit and ninety-five (95) degrees Fahrenheit. See Section 512 for specific environmental conditions for HVAC performance.
b. The boat shall be capable of full operations in Full Load condition in up to 3 foot 1/3 significant wave height waves and reduced capacity in up to 5 foot 1/3 significant wave height waves. Wave characteristics defined by Wilbur Marks Scale per Table A1-H of Performance by Design.
c. The primary areas of operation shall consist of seawater and brackish waters. PB-X shall be capable of conducting fresh water operations.
070-2 Load Conditions
a. The following load conditions are provided for reference throughout this specification. These definitions apply to the engineering design values for weight and moments of the vessel in the described condition. Weight Management Process Guidance for Boats and Craft, NSWCCD-80-TR-2014/038 shall be used for guidance.
b. Lightship: The boat is complete in all respects including outfit (defined in Section 600), Government Furnished Equipment (defined in Section 400) and ready for service with liquids in machinery at operating levels, but no payload, personnel, fuel, or other variable loads.
c. Full Load Condition: Lightship plus payload as defined in Section 050 and full fuel. Fuel weight shall be calculated using a density of 7 lbs/gallon.
d. Minimum Operating (MinOp) Condition: Lightship plus crew and 10% fuel.
e. PDIT Load Condition: Full Load Condition
f. Boat Over-the-Road (OTR): Lightship plus full fuel and mission gear (3,310 lbs), and a 5-10% margin for growth. Note the 5-10% margin is used for sizing of the trailer. The trailer axles and components shall support the boat/trailer within the 5-10% margin range.
g. Trailer Curb Weight: Trailer complete in all respects, including all tools/stowages on trailer, OTR tiedown straps, and misc. material required for OTR transport (e.g. boat covers, tiedown strap chafe protection, etc), and a 5-10% margin for growth.
h. Gross Vehicle Weight (GVW): Combined Boat OTR and Trailer Curb Weight.
i. Trailer Design Hoisting: Trailer Curb Weight using a 10% margin for growth.
j. Combined (Boat and Trailer) Design Hoisting: Combined Boat OTR using a 10% margin for growth (weight and moment) and Trailer Design Hoisting (weight and moment), including any additional material needed for hoisting trailer beneath boat (e.g. additional tiedown straps, ballast (if necessary) and deck tiedowns, etc).
k. Boat Only Internal Air Transport (IAT): Boat OTR, reduced to have no more than 25% fuel, without mission or personnel gear, rounded up to the neared 1000 pounds (minimum)
l. Trailer Only IAT: Trailer curb weight, rounded up to the nearest 1000 pounds (minimum)
m. Boat Design Hoisting at Sea: Full Load and a 10% margin for growth.
070-3 Seakeeping, Dynamic Stability and Maneuverability
a. The PB-X shall be safe and controllable at all speeds and under all loading conditions specified herein. Safe and controllable includes operation where boat orientation, motions, and accelerations do not pose a hazard to the crew or passengers that is not otherwise controllable by good seamanship and boat handling.
b. In Full Load and MinOp Condition and at all speeds defined herein, the PB-X shall be able to maintain a straight course. Without coxswain action for 10 seconds, the boat shall not deviate course by more than 5 degrees in calm, flat conditions.
c. Builder shall verify PB-X meets “Quick Turn Test Methods” requirements of ABYC H-26.8.3.1 and “Avoidance Line Test” testing parameters of ABYC H-26.8.3.2.
d. In turns at all speeds, including up to the maximum required speed, and loading conditions, PB-X shall maintain a steady turn rate without skidding or any other effects of dynamic instability. Inboard heel shall be maintained throughout turns at speeds above fifteen (15) knots. When coming out of a turn, the boat shall respond to the steering command.
e. The PB-X shall be capable of stopping from maximum speed to under 5 knots in less than 10 seconds without immersing the bow. Spray/splashing in the bow and astern are acceptable provided that there is no ingestion of water in the engine air intake.
f. Dynamic Stability: The PB-X shall be dynamically stable (oscillatory and non-oscillatory) at all operational loading conditions and speeds.
g. The astern performance shall be such that the PB-X can be maneuvered in reverse at speeds at least 3 knots in a straight course and perform backing turns to port and starboard.
070-4 American Boat and Yacht Council (ABYC) Standards
As a minimum, the boat in all respects shall meet ABYC standards and recommended practices.
070-5 Alterations
Alterations to Original Equipment Manufacturer's (OEM) products by the builder or distributer are highly discouraged. If alternations are necessary, documentation of the change shall be provided with the Technical Data Package (TDP).
070-6 Equipment Installation
a. Unless otherwise specified, OEM recommendations for design and installation of their products into the boat shall be followed. Systems and components shall be selected for durability, longevity, safety, and ruggedness. Components shall be selected to maximize the use of Commercial-off-the-shelf (COTS) products and commonality between hulls. Systems and components shall be installed with proper tools and aligned with best industry practices.
b. All systems shall be free from leaks and safety hazards. Workmanship shall be in accordance with industry best practices.
c. Galvanically dissimilar metals (copper compounds or stainless steels, aluminum) shall be isolated using insulating materials to prevent any path for electrical current.
d. Foundations and brackets for equipment shall be configured to provide access for cleaning, painting, preservation, and maintenance, and to prevent accumulation of water, dirt, and foreign material.
e. Connecting piping and wiring shall be run to minimize exposure to weather. Bulkhead and deck penetrations shall be as close as practicable to the equipment being served, preferably by direct connection through the adjacent deck or bulkhead.
f. Systems, equipment, and components shall be installed to facilitate accessibility for operating efficiency and for inspection, adjustment, and repair. Permanent fittings and structure shall be kept clear of routes required for the removal of machinery and equipment. The space behind equipment may be inaccessible after installation; this factor shall be considered in providing proper preservation in way of such equipment and in selecting the location of pipes, ducts, wireways, and other permanent fittings behind such equipment. Nooks, cracks, and openings where water, dirt, dust, or foreign material can accumulate shall be avoided.
g. Protection of personnel against operating hazards shall be provided. Shafting, couplings, gears, flexible shafts, and similar items shall have adequate guards installed for protection of personnel. Such protective guards shall be removable without dismantling the machinery surrounded.
h. Guards shall be as light as is consistent with required protection and strength. Guards shall be of sufficient strength to be used as steps or hand holds if located where such use may be anticipated.
i. Protective guards or insulation shall be installed to prevent contact with equipment where surface temperatures exceed 140 °F. Protective guards, insulation, or caution signs shall be installed to prevent contact with equipment where surface temperatures exceed 120 °F, up to 140 °F.
j. Protective guards shall also be installed as barriers to prevent personnel from inadvertently contacting energized and exposed electrical circuits, components, and terminals.
k. Equipment shall be protected against the hazard of personnel brushing against or being thrown against the equipment, particularly under heavy sea conditions, and inadvertently causing damage to exposed components or resulting in maladjustment of exposed functional controls such as push buttons, knobs, and switches. Protection shall be provided by equipment arrangement or design or by installation of enclosures, screens, or guard rails. All sharp edges exposed to personnel shall be dressed, ground or radiused to avoid injury to personnel.
071 ACCESS
071-1 Accessibility
Electrical and mechanical components shall be accessible for maintenance and repair. All items requiring operation or maintenance (e.g. switches, valves, filters, strainers, seacocks, etc.) shall be readily accessible while at the dock, on the trailer, or underway. Stowage and securing of arches, antennas, masts or other items shall not prevent access to critical items such as battery switches, fuel shut off valves or other items that need to be checked, secured, or operated for any of the required transport modes.
071-2 Bilge Access
All bilges and voids shall have removable plates or hatches for bilge access/inspection. The access and inspection openings shall be of sufficient size and location to allow personnel visual access to the entire bilge and void areas.
073 NOISE, VIBRATION, AND RESILIENT MOUNTINGS
073-1 Noise Levels
To avoid requirements for hearing protection, noise levels in cabin shall not exceed 82 dBA for twelve (12) hour exposure duration. If noise levels on the aft deck exceed 82 dBA for twelve (12) hour exposure duration, appropriate warning labels shall be provided on the boat advising personnel of the noise hazard and the need for hearing protection.
073-2 Sound Attenuating Materials
Any sound attenuating material shall: (1) not hinder inspection of the interior hull and hull structure; (2) be resistant to absorbing any type of liquid or vapors; (3) not cause any corrosion to the hull material; and (4) be noncombustible.
073-3 Resilient Mounts
Mounts for removable components and accessories subject to vibration, including items moved for towing or transport, shall be provided with resilient material as necessary to prevent rattling.
075 FASTENERS
075-1 Stainless Steel Fasteners
a. Fasteners shall be Stainless Steel, ASTM F593, type 316. Self locking hardware shall be used unless otherwise specified. Where required for high strength application (e.g. engine shaft coupling), non-stainless, high strength fasteners with corrosion protection require Government approval.
b. Component mounting shall be through-bolted with ASTM F594 nylon insert lock nuts and flat washers wherever practical to suit fastener reinstallation during maintenance and repair. Fender washers shall be used on all bolted connections where backing plates are not provided. Threaded fasteners shall fully engage nuts with thread protrusion. Excessive thread protrusion that poses personnel hazard shall be avoided. Fasteners may be threaded into structural or non-structural materials only with government approval. Any pins used for folding, removable, or stowable features shall be secured with stainless steel lanyard to prevent loss.
078 MATERIAL
078-1 Structural Material/Aluminum
a. Metal structure shall generally be of welded construction. Except as otherwise specified or approved by the Navy, structural aluminum materials shall conform to the following specifications:
b. Sand-cast (3560 T6)
c. Plate and sheet (5086 H116 or 5086-H117 both ASTM B928; for non-welded applications 6061 T6 or 6061 T651 may be substituted.)
d. Extrusions (5086 H111; for non welded applications 6061 T6 or 6061 T52 may be substituted.)
e. Drawn tube (5086 H32; for non welded applications 6061 T6 may be substituted.)
f. Non-structural components such as handrails, small component brackets and wire ways may include extruded 6061 material.
g. Stainless Steel (if used) shall be:
i. Cast for general applications (J92800 or J92500; for non-welded applications UNS J92900 or J92600 may be substituted.)
ii. Cast for underwater applications (J92800; for non-welded applications UNS J92900 may be substituted.)
iii. Plate/sheet, bars/shapes, tubing, pipe (S31603; for non-welded applications S31600 may be substituted.)
078-2 Fiber Reinforced Plastic
a. Laminating resins shall be of the vinylester type. Laminating vinylester resins shall be of the fire-retardant type conforming to MIL-SPEC MIL-R-24719.
b. Gel coat resins shall be of the fire-retardant type compatible with laminating resins. Gel coat resin shall be impact resistant and resilient. Greater flexibility of the gel coat as compared to the laminating resin is required. Pigments shall be added in accordance with the gel coat resin manufacturer’s recommendations in order to obtain the required color. Gel coat resins shall be Haze Gray FED-STD 595C (1) Color Number (26270) in color.
c. Laminating reinforcement shall be compatible with the laminating resins.
078-3 Bedding Compounds
Polysulfide and polyurethane sealants may be used above and below the waterline. Where waterproof adhesive bonds are required, a polyurethane compound shall be used.
078-4 Non-Biodegradable Materials The use of wood and other hygroscopic or biodegradable materials anywhere on the boat is prohibited. All materials shall be marine grade and resistant to corrosion and ultraviolet (UV) exposure.
078-5 Fabric Material
All boat fabric shall be marine grade as well as fade, stain and mildew resistant and as near a match in color as possible to the surface it is mounted to or covering unless otherwise noted. Fabrics shall be easy to maintain and waterproof and/or breathable where required. All seams, edges, grommets, fastening points and areas of chafe shall be reinforced. Venting is acceptable to ventilate covers, but must minimize or eliminate the intrusion of water. Seats, seat fabric and foam shall be durable, provide comfort and be flame retardant.
078-6 Interior Materials
All interior materials shall be fire retardant.
078-7 Other
a. All materials normally subjected to sunlight shall be highly resistant to degradation caused by ultraviolet radiation.
b. Joining surfaces between mechanically fastened metal components and between metals and laminates shall be protected by the use of bedding compound or structural adhesive, as applicable.
079 STABILITY
079-1 Stability Requirements
a. Intact Stability
i. The boat shall meet the intact stability requirements of NAVSEACOMBATSYSENGSTA Report No. 6660-99 Rev. A, Procedures Manual for Stability Analysis of U.S. Navy Small Craft in Full Load, Full Load less 50% fuel and MinOp conditions. The craft shall be evaluated as a coastwise category C craft per Table 2 “Wind Velocities” of the standard.Any gunwale tops, vents or openings that allow water to enter into a cockpit or below deck shall be used as the down flooding points. All windows, hatches, and openings in decks that do not meet ABYC H-3.7.3 test for watertight devices or structures shall be treated as down flooding points.
b. Damage Stability
ii. The boat shall meet the single compartment damaged stability requirements of NAVSEACOMBATSYSENGSTA Report No. 6660-99 Rev. A, Procedures Manual for Stability Analysis of U.S. Navy Small Craft in Full Load, Full Load less 50% fuel and MinOp Conditions.
iii. Unless otherwise proven by direct analysis, permeability for hull compartments shall be as follows:
· Machinery Spaces: 0.85
· All Other Spaces: 0.95
iv. If required, flotation foam shall be modeled as non-floodable space in flooded compartments.
079-2 Flotation Foam
If flotation foam is required and used to obtain the proper flotation characteristics, foam in place solutions (pour in foam) shall not be used. Flotation Foam installed shall meet ABYC H-8.10 Material specification and ABYC H-8.11 Installation requirements.
079-3 List Limits
a. The PB-X shall not list more than one (1) degree in static condition in the Full Load and MinOp conditions. Ballast shall not be used to meet this requirement.
b. The PB-X shall not list more than one degree at any speed when running straight in calm water conditions.
084 TRANSPORTATION AND HANDLING
084-1 Air Transport
a. Boat and trailer combination when configured for air transport shall meet all requirements (size, weight, tiedown) for air transportability in a C-17, including personnel safety aisle criteria. Items may exceed the height or width envelope if hinged or removable and are provided with proper securing for stowage during transport. Appendages may be hinged, removed, or otherwise lowered to meet air transport height restrictions provided the boat can be returned to its operational condition within sixty (60) minutes by no more than three (3) personnel without the use of power tools or special equipment not carried on the boat during normal operations. Tiedowns shall be provided on the trailer and boat to provide a restraint independent of each other of 3 G fwd, 2 G up and 1.5 G aft and laterally.
b. Not-to-exceed parameters for C-17:
i. Height – 142-156 inches (Based on longitudinal position within the plane);
ii. Width - 204 inches (note: road transport limit below is more restrictive);
iii. Additional information is available in: MIL-STD-1366E (Table 25, Figure 27); additional guidance in MIL-STD-1791A Appendix C, Fig. 1.
084-2 Road Transport
a. Boat and trailer combination when configured for road transport shall meet all requirements for wide load w/o escort vehicle road transport on Continental United States (CONUS) Highways, i.e. “CONUS with Restrictions” per NSWCCD-23-TM-2009/64 Rev C.
b. Boat/trailer combination when configured for road transport shall not exceed the following dimensions:
i. Height -162 inches (to meet common bridge height restrictions)
ii. Width - 143 inches (to provide 1 inch margin from actual limit)
iii. Length – 719 inches
c. Items may exceed the height or width envelope if hinged or are otherwise collapsible for transport. Appendages may be hinged, removed, or otherwise lowered to meet road transport height restrictions provided the boat can be returned to its operational condition within sixty (60) minutes by more than two (2) personnel without the use of power tools or special equipment not carried on the boat during normal operations. Trailer components (except goal posts, if installed) shall not be removed to meet this requirement.
084-3 Marine Transport, Launch and Recovery
a. Deck Cargo: Combination boat and trailer shall be capable of marine transport on decks of USN and/or MSC / Commercial / Coalition shipping.
b. Hoisting at Sea Launch and Recovery: The Boat in Boat Design Hoisting at Sea condition shall be capable of at sea launch and recovery from a ships crane.
c. Well Deck Launch and Recovery: The boat in Full Load condition shall be capable of well deck launch and recovery at sea from USN L-Class amphibious ships. Maximum permissible well deck navigable height from keel to fixed structure (i.e. antenna on hinged foundations) is ~24 feet. Removable Well Deck kickstand(s) shall be provided. The stands shall be manually deployed from boat once in well deck and permit the boat to rest on its keel and support boat upright (prevent heeling) during well deck ballasting/de-ballasting. Stand to be removable and installed on boat prior to departure when required by mission.(e.g. bolt on bolt off).The boat will be equipped with a vertical center keel capable of supporting the boat when resting on the well deck. The keel shall be sized appriopriatly to withstand the downward acceleration listed in Section 084-4 iv. without damaging the boat when the hull is resting on the well deck.
084-4 Boat Tiedowns
a. Boat and trailer shall have aluminum or stainless steel tiedown provisions (e.g. transom tiedown eyes, trailer D-rings, etc). Tiedown provisions not suitable for hoisting with trailer shall be labeled clearly and conspicuously. Labeling of the fittings shall include load ratings of the fittings in pounds (lbs.). Tiedown provision and adjacent structure shall be sized for maximum applicable load, as follows and summarized in Table 084-4.1:
i. OTR Transport: Restraint of boat to trailer using Boat OTR load condition (Section 070), shall be designed per MIL-STD-1366E and 49CFR393.102, to provide a minimum safety factor of 1.5 on yield strength
ii. Internal Air Transport (IAT): Restraint of boat and trailer using IAT load condition (Section 070), shall provide a minimum safety factor of 1.5 on yield strength for accelerations of 3g Forward, 1.5g Aft, 1.5g Transverse, 2g Up and 4.5g Down (shoring permitted).
iii. Trailer Hoisting: Trailer Design Hoisting condition with a minimum safety factor of five (5) on ultimate strength for hoisting the trailer and the boat with the trailer.
iv. Marine Transport: Dedicated tiedown provisions shall be provided for securing boat (in Full Load condition) and boat/trailer (at the GVW) combination to the ship. Provision design limit loads shall be as follows: 0.45g in the longitudinal direction, 1.1g in the lateral direction, 0.82g in the vertical direction and 2.4g in the down direction. Each tiedown provision shall be designed to a safety factor of 1.5 on the yield strength of the material in each direction of the design load. Labeling of the fittings shall include load ratings of the fittings in lbs.
b. Notes:
i. If aluminum or stainless steel trailer tiedowns are not available, hot-dipped galvanized components may be used.
ii. Boat and trailer may be considered separately (each at their own IAT weight) to assist in IAT restraint calculations.
iii. Trailer winch cable shall not be considered in restraint calculations for IAT or hoisting, but may be considered for OTR loads.
c. See Transportability Design and Certification Process Guidance NSWCCD-23-TM-2009/64 for additional details.
Table 084-4.1. Tiedown Analysis Summary
| Mode |
| Load Condition |
| Safety Factor |
| Forward G’s |
| Aft G’s |
| Lateral G’s |
| Up G’s |
| Down G’s |
| Over the Road |
| Boat OTR |
| 1.0 Breaking Strength |
| 0.8g |
| 0.5g |
| 0.5g |
| 1.5 Working Load Strength |
| 0.435g |
| 0.5g |
| 0.25g |
| Internal Air |
| IAT |
| 1.5 Yield Strength |
| 3.0g |
| 1.5g |
| 1.5 |
| 2g |
| 4.5g |
| Trailer Hoisting |
| Trailer Design Hoisting |
| 5 Ultimate Strength |
1.0g
| Maritime |
| GVW |
| 1.5 Yield Strength |
| 0.45g |
| 0.45g |
| 1.1g |
| 0.82g |
| 2.4g |
084-5 Tiedown Straps
a. Tiedown straps shall be provided that comply with “Recommended Standard Specification for Synthetic Web Tie Downs”, Web Sling & Tie Down Association WSTDA-T-1, except that:
i. Straps are sized for a safety factor of five (5) based on maximum boat-to-trailer design load when suspending completed trailer weight beneath boat.
ii. The trailer tiedown strap arrangement shall provide that no single strap failure will result in the trailer being ‘dropped’ during the lift. In addition to the marking requirements of WSTDA-T-1 all straps used for hoisting the trailer shall be permanently marked identifying the testing activity, contract number, date of testing, boat type, rating and intended usage of the strap (and leg to fitting identifier, i.e. 'FWD PORT') and a unique serial number. The optional label from WSTDA-T-1 “not to be used for lifting” shall not be installed.
084-6 Trailer Highway Trailer shall be towed by a FL-80 or equivalent prime mover with a Gross Vehicle Weight Rating (GVWR) of 40,000 lbs and shall have the following characteristics:
a. Aluminum or hot-dipped galvanized steel construction. No wood allowed.
b. Trailer shall be a triple or tandem axle.
c. GVWR shall not be less than designed GVW (with 5-10% margin per Load Conditions section).
d. Light Truck (LT) series tires, as a minimum.
e. Matching and mounted spare tire and wheel.
f. Brake actuation components shall be capable of total submersion in salt water for short periods of time.
g. Air-over-hydraulic, or full air, brakes shall be installed on each axle. All brake components shall be suitable for submersion. Brake system shall be designed to FMVSS 571.121.
h. Stainless steel hydraulic brake lines with smooth regular bends. Hydraulic flex hoses, where necessary, shall be stainless or kevlar, and have a minimum rating of 3000 psi.
i. On-trailer stowage for tools and tiedown straps.
j. Forward ladder or steps with two-sided handrail, providing access to bow of boat.
k. Platform adjacent to winch for operator to stand while launching.
l. 5 ton minimum hand winch with non-metal low-stretch synthetic cable and closed end snap hook.
m. Jack stand or landing feet designed for all load conditions and center of gravity conditions, including empty trailer and GVWR.
n. 3" lunette ring rated consistently with trailer GVWR.
o. Fender material shall be aluminum or non-metallic. Fenders shall be fully protected from contact with boat hull, or of a design impervious to hull impact.
p. Safety chain or cable sized in accordance with federal regulations.
q. Hull support surface shall be Ultra-High Molecular Weight (UHMW) Polyethylene to reduce hull friction. Supports shall be sized to support boat under accelerations for applicable transport modes. UHMW supports shall have recessed hardware with at least ¼” wear allowance beyond recessed fasteners. Fasteners shall be located to reduce likelihood of hull interference. Hull bunks and supports shall prevent keel impact with trailer structure during ramp launches and recoveries at various ramp angles.
r. Service and auxiliary air connections.
s. Electrical system shall be equipped for 12 Vdc (w/ commercial 7-pin round plug w/ round connectors) and 24 Vdc (w/ 12-pin NATO plug).
t. Electrical system components shall be marine grade using ring terminals sealed w/ heat shrink at all connections.
u. Lighting shall be submersible LED.
v. ASTM F593, type 316 stainless steel fasteners, flat washers, and ASTM F594 nylon insert lock nuts throughout (No threading of aluminum).
w. Aluminum or 316 stainless steel components used where possible (e.g. fenders, brackets, etc.), hot-dipped galvanized steel elsewhere (e.g. axles).
x. Suspension type and strength shall be consistent with trailer GVWR. Each individual axle should be rated to carry at slow speeds the entire weight of the boat and trailer in the over-the-road (OTR) condition.
y. Hubs rated at highway speeds for a minimum of 50% of the axle rating.
z. Positive pressure hub system to prevent water contamination of hub lubrication during submersion.
aa. Loaded trailer dimensions shall be within acceptable limits for all applicable transport modes.
ab. Lifting and tiedown provisions rated capacities to suit hoisting and tiedown requirements.
ac. Lifting and tiedown provisions labeled per MIL-STD-209.
ad. The trailer shall comply with all applicable federal requirements, including CFR title 49 Chapter III Part 393 and Chapter V Part 571, excepting that the CFR exclusion of heavy trailers does not apply for all cited CFR requirements.
ae. Components shall be electrically isolated where galvanically dissimilar components are installed.
af. Tools required for trailer operation and any special tools required for trailer repair shall be provided.
ag. Lug nuts shall have torque flag / loose wheel nut indicators installed.
SECTION 1: HULL STRUCTURE
100 GENERAL REQUIREMENTS FOR HULL STRUCTURE
100-1 General Structural Requirements
a. The boat structural design shall be compliant with ABS High Speed Naval Craft (HSNC) or International Standards Organization (ISO) 12215 that are appropriate for the construction material, hull form and speed of the PB-X. Alternatively structure design can be based on first principle design calculations.
i. The following caveats shall supersede the requirements of 12215:
· Design Category shall be B (7.2)
· Ncg shall not be taken less than 3.0 (7.3.2)
· P(DM MIN) = 1.78 psi (8.1.6)
· P(SUP M) not less than 1.0 psi (8.1.7)
· The structure shall be constructed in accordance with ISO 12215-6:2008 Small Craft — Hull Construction and Scantlings — Part 6: Structural Arrangements and Details.
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