A04_SOW_Specs.pdf

USFWS-CFWCO ELECTRIFIED DOZER TRAWL SPECIFICATIONS

- Boat Dimensions and specifications

- Hull: 8 degree Semi V Flat Bow (Must have a squared, flat bow)

- Length: 22’

- Beam: 96”

- Gunnel (Side) Height: 29 1/2”

- Transom: 25” with 2” drain plug (Transom specifications must be applicable for Yamaha 175HP outboard motor)

- Splash well: Continuous well from port gunnel to starboard gunnel forward of motor to match 29 1/2” gunnel height. (Instead of a well that only surrounds the immediate vicinity of the motor, the well should be across the entire rear of the boat to drain any water that comes over the transom back out of the boat).

- Decking: .125” Aluminum Diamond Plate

- Front Deck: 54” Diamond Plate Weep Deck/96” Beam

- Gunnel: 1-¼" Aluminum Pipe

- Boat Motor:

- OUTBOARD PROPELLER DRIVE MOTOR SPECS:

- 175hp Four Cylinder Four Stroke 2.8 Liter

- 2785cc displacement

- 50 amp alternator output at WOT.

- Dual overhead camshaft in-line 16-valve, long tube intake tracts

- 25” shaft length electronic fuel injection.

- 96 x 96.2 mm (bore x stroke)

- 485 lb. dry weight

- TCI Microcomputer Ignition

- 10.3:1 Compression Ratio

- 1.86:1 Gear Ratio

- Full Throttle RPM range 5000 – 6000

- Cowling drain system

- Trim range -4 to +16 degrees

- Compatible with mechanical controls

- 16 pitch stainless steel prop

- Generator: 7000 watt 120/240V inverter generator with CO-MINDER mounted on an elevated platform. Gasoline powered/isolated electric/exhaust to expel over gunnel (STARBOARD Rear, Must fit Honda EU7000is generator)

- Battery Box: Located beneath generator platform with 12-volt on-board battery charger 2-bank and master power switch

- Fuel Tank: 25 Gallon Permanent Aluminum (Port Rear to balance weight)

- Trailer:

1) Galvanized steel

2) Tandem torsion spring axels – 6000 lb each

3) Tandem rollers

4) 2 5/16” hitch

5) Guide bunks

6) Hydraulic braking system

- GVWR must not be in excess of 12,000 lbs.

- Console: Starboard console with shelf and lockable glove box

- Driver Seat: stationary with swivel and shock absorption. To be mounted with back of seat approximately 25” from closest part of steering wheel. This should be ergonomic and comfortable for a person of average build to reach all the controls.

- Electrofishing Box Compartment: An aluminum compartment to contain the electrofishing box on top of the console. Dimensions-21”-Width, 11”-Depth, 12”-Height (Should fit ETS trident and mbs electrofishing control box)

- Windshield: 0.25” Plexiglas with aluminum tube frame

- Protective Netting Around Console: Protective netting around the starboard portion of the console connecting to the Plexiglas windshield with aluminum tube frame. Netting should be composed of 0.75” mesh dyneema netting with UV protection

- Storage: Dry bulkhead storage compartment (step to front deck) and dry long storage compartment along port side in front of generator mount

- Bilge Pump: 3000 GPH automatic bilge pump with switch

- Navigation Lights: these must be mounted above front gunnel height so they cannot contact the trailer and break when the boat is being loaded on the trailer.

- Depth Finder and Transducer: Depth finder mounted on console and transducer mounted to transom (Must fit Lowrance Elite FS9)

-Front deck: there must be no holes drilled through the aft lip of the front deck to keep water from draining through onto the dry bulkhead storage compartments in the step leading up to the front deck.

Wiring should instead be routed over this lip.

-Gantry -Dimensions and materials described in Figure 4.

-Bow Safety Railing -Dimensions and materials described in Figure 4.

-Removable front rail

-Stainless steel locking mechanism on starboard side and stainless-steel hinge on port side of front rail -Affords the ability to quickly detach front rail and swing towards the port side and lock back for ease of net retrieval

-Trawl Boom -Dimensions and materials described in Figure 5.

-Trawl Frame

-Dimensions and materials described in Figure 10. The mounting hole that attaches the trawl frame to the trawl booms via a tractor pin MUST NOT be drilled through the tubing of the trawl frame as it seems to weaken the structural integrity. The mount must be instead welded on the back of the tubing.

-Electrofishing Booms and Anode -Pivot/Swing electrofishing booms

- Two x 120” total (measured from center of mounting pivot joint to tip of boom) with welded on pivot base plates

- The entire length of each boom must be constructed of 2” outside diameter, 0.25” wall one-piece ISOFR structural round fiberglass tube with the exception of the immediate pivot joint (which must be fabricated/machined from aluminum for strength and extend to the INSIDE of the fiberglass boom pole far enough to create a rugged joint with no play between the pivot joint and the fiberglass tube. These must be joined with epoxy and a pin or bolt.)

- Non-conductive material for added safety

- Include welded on boom cradles and chain hangers

- Must include stops to retain booms in parallel configuration when deployed forwards of boat. This are to prevent the booms from swinging together and into the path of the net frame as it is raised and lowered. These are in addition to the tightening mechanism on the Electrofishing boom pivot hinge. The stops should contact the booms on the fiberglass tubing instead of the pivot joint to reduce stress on the pivot joint components and ensure the booms cannot come out of parallel configuration when deployed. Booms must be mounted far enough apart that they will not contact the net frame as it is raised and lowered.

- Support chain with non-conductive section; bungee safety straps

- Bonding wires (DLO) and heavy duty lugs

- All stainless-steel hardware -15ft of 10ga DLO wire from each boom -Bulgin connections from booms to anode

- Anode

- Angle Aluminum 90” long

- Three 0.25”, 48” long stainless-steel cable droppers with welded ends to prevent fraying centered in the anode

- Bulgin connections from anode to booms

- Electrofishing Booms and Anode placement and construction described in further detail in Figures 11-13.

- Winches

- Two x 12 volt 3500 lb. winches and remotes.

- IP68 rated, 3 stage planetary geartrain, 50’ x 3/16” synthetic rope, black powder coated hook, hawse fairlead, mechanical brake, 9.5 ft/min line speed @ 204 amps motor current draw.

Contractor for winch actuation MUST be one piece integrated with the winch body.

- Connected to battery bank with charger and switches to operate

- Battery bank (2 batteries) for the winches should be housed in the front dry storage step.

- All wires to and from winches must be in watertight (from battery compartment to winch) conduit and attached to gantry frame

- Batteries for winches must be connected in parallel configuration to equalize rate of pull for winches, as well as being connected to the isolated charging circuit of the outboard motors stator.

-Remotes for integrated contactor winches typically plug directly into the winch. No remote connections should be lower than the top two thirds of the gantry and must be positioned to be out of the way of the work area on the front deck

-Noise

- vessel must not subject users to sound exceeding those listed in Table G-16 of OSHA standard 1910.95.

General Electrofishing Safety Specifications

Design.

(1) Boat design and equipment must be in compliance with U.S. Coast Guard and State regulations and U.S. Department of the Interior policy (also see 241 FW 1).

(2) The forward deck area must have substantial safety rails to help prevent staff from falling overboard. Safety rails must withstand staff leaning on them without collapsing and rails should be at least 42 inches from the top of the rail to the deck.

(3) Electrode booms (anodes with DC) must be mounted in a stationary position on a metal-hulled boat.

(4) All metal surfaces on a boat must be electrically connected (in electrical continuity) to eliminate differences in electrical potential that may cause electric shock. Ground the generator case to the hull by a direct attachment, with a ground strap, or 8 AWG sized wire.

(5) An acid proof, nonmetallic enclosure and holder must be provided for wet cell batteries.

https://www.fws.gov/policy/241fw1.html

(6) For typical power sources, the recommended conductor voltage capacity is 600 volts RMS minimum for the main circuit and 300 volts RMS maximum for the safety circuit.

(7) For typical power sources, the recommended conductor size is 10 AWG for the generator power cord and main circuit. The suggested safety circuit size is 14 – 16 AWG.

(8) For typical power sources, the recommended connector plug and socket rating is 600 volts/32 amps minimum for the main circuit and 250 volts/30 amps for the plug to the generator.

(9) All conductors must be enclosed in liquid-tight conduits. Conduit must be durable, fixed to the boat to prevent breakage, and continuous from all junction boxes to components with watertight connections where applicable. Where external connections are necessary (e.g., to the booms, pulsator, or foot safety switch), use appropriately rated SOOW and SJOOW cables, watertight condulet/junction boxes, and connector plugs and sockets (meeting the NEMA 4 and IP65 standards or greater). All conductors installed in a common raceway (conduit) must be continuous (without connectors, breaks, or splicing) and independently and correctly insulated. High and low voltage (safety circuit) conductors do not need to be placed in separate conduits.

Wiring.

(1) Conductor Type: Only copper wire is acceptable in electrofishing units. This applies to the branch circuits, not the generator.

(a) Wires enclosed in conduit, condulet/junction boxes, and connectors must meet National Electric Code (NEC)-designated types for damp locations. We recommend type Diesel Locomotive Cable.

(b) Where conductors must run outside conduit and condulet/junction boxes, use SOOW (600 volt) or SJOOW (300 volt) cables.

(2) Conductor Voltage: The insulation value for all wiring in electrofishing units must meet or exceed the maximum voltages that the power source or pulsator generates. Insulated wires are specified with an Alternating Current (AC) voltage Root Mean Square (RMS) rating. AC RMS voltage is equivalent to Direct Current (DC)/Pulsed Direct Current (PDC) average voltage.

(a) You can compare maximum AC voltage expected directly to the conductor voltage rating.

(b) You can compare the highest expected peak DC or PDC voltage to the conductor rating by accounting for duty cycle. For example, a 600 volt RMS conductor rating can handle 2,400 peak volts PDC at a 25% duty cycle.

(3) Conductor Amperage: See below for minimum conductor size (i.e., for copper wire) for rated RMS amperage of equipment. Always check the manufacturer’s specifications for conductors. You can compare maximum expected AC RMS amperage or DC/PDC peak amperage with conductor capacity in the same manner as with conductor voltage.

Minimum Conductor Sizes (Maximum Amperage /Minimum Conductor Size)

- 11/20 American Wire Gauge (AWG)

- 16/18 AWG

- 22/16 AWG

- 32/14 AWG

- 55/10 AWG

- 64/9 AWG

- 73/8 AWG

- 15/83 AWG

- 18/12 AWG

(4) Conductor Placement: All conductors outside of the pulsator must be enclosed in conduit, condulet/junction boxes, connectors, or cables.

Conduit. Conduit must be liquid-tight. We recommend non-metallic liquid-tight (NMLT) conduit.

Condulet/Junction Box. Condulets or junction boxes must be designed for wet locations, and meet the National Electrical Manufacturers Association (NEMA) 4 standard at a minimum.

Connections.

(1) When using conduit, wiring may only be spliced inside condulets or junction boxes. If connections are necessary, the rating of the connector must be the same or greater than the wire.

(2) Connector plugs and sockets used with flexible cables must be watertight and meet the NEMA 4 or Ingress Protection (IP) 65 standard, at a minimum. You should use a splash cover (e.g., a rubber hood) to protect the connection to the generator.

The Electrified Dozer Trawl Figure 1: The Electrified Dozer Trawl incorporates seven main components: The gantry (1. red), the trawl boom (2. green), the trawl frame (3. pink), the trawl net (4. dark green) the electrofishing booms (5. orange), the anode (6. turquoise), and the boat (7. black, which is also the cathode).

5 7

6 4

The Gantry (1) and Trawl Boom (2) (figures 2-5) Figure 2: Two 2500LB winches mounted on top of the gantry (red) raise and lower the trawl boom (green) and trawl frame (pink) assembly.

Figure 3: Gantry schematics, rear view (view from stern).

Figure 4: Gantry schematics, side view (view from starboard).

Figure 5: Trawl boom schematics.

The Trawl Frame (3) (figures 6-10) Figure 6: The trawl frame (pink) uses a system of cables, risers, and turnbuckles to provide strength and rigidity to lightweight materials.

Figure 7: Alternate view of the trawl frame to highlight cables and turnbuckles.

Figure 8: The trawl frame (pink) is attached to the trawl boom (green) with implement pins to allow quick disassembly for transportation.

Figure 9: The top of the trawl frame (pink) is held at an orientation perpendicular to the trawl boom (green) by a cable system that incorporates a safety break-away (dark blue). This is made of low strength (one loop of #12 tarred nylon seine twine is a good place to start and adjust from there) cord that breaks when the trawl frame impacts an object allowing it to swing away.

Figure 10: Trawl frame schematics.

Electrofishing Booms (5) Figure 11: The electrofishing booms (orange) are adjusted for height by a length of light weight chain and a carabineer incorporated into the support line.

Figure 12: The electrofishing booms (orange) are supported by an adjustable line that connects to the gantry (red) at a point outboard of the winch lines for the trawl boom (green). This allows full range of movement for the trawl boom without interfering with the electrofishing boom support lines.

The Anode (6) Figure 13: The anode (turquoise) is comprised of an aluminum tube to which stainless cable droppers are affixed. This tube plugs directly into the positive (+) quick disconnect coupling on the end of the electrofishing booms (orange). Like any standard electrofishing system, there are many ways that anode design can be modified or changed to meet amperage goals in different conductivities and to calibrate the field for best-catch of targeted species. For example, a large field with a small net may cause undesired avoidance, lowering catch rates compared to a small field paired with a small net. These factors are predominantly controlled by anode design and distance between anode and cathode. The cable droppers are limited in length so that they cannot drift back and contact the trawl frame (pink) or boat hull (black). This picture depicts a standard three dropper array with minimum distance between anode and cathode to create a small field with a tight gradient aimed at minimizing avoidance.

USFWS-CFWCO ELECTRIFIED DOZER TRAWL SPECIFICATIONS