354-D025-01_Rescue Boat Davit Test Memorandum.pdf

USACE ESSAYONS

IMO Number 7923495 Project Number 3560

FAST RESCUE BOAT DAVIT

INSTALLATION TEST MEMORANDUM

REVISIONS

REV SHEET DESCRIPTION DATE APPROVED

- ALL INITIAL ISSUE 05/22/2026 T. BRACKIN

DRAWING NO. REV SHEET NO.

354-D025-01 - 1

354-D025-01 Sheet 2 of 15

USACE ESSAYONS

IMO Number 7923495 Project Number 3560

SHIP TEST MEMORANDUM

FAST RESCUE BOAT DAVIT

TEST COMPLETION CERTIFICATION

The following persons certify that this test has been completed to their satisfaction:

NAME DATE AFFILIATION

354-D025-01 Sheet 3 of 15

A. REFERENCES

1. VD131682 PLD-3600 General Arrangement (Replacement Rescue Boat Davit)

2. VD-IM-925071, Vest Davit PLD-3600 User Manual Preparation & Installation

3. VDT-DS-PLD-3600 Vest Davit PLD-3600 Technical Datasheet (Replacement

Rescue Boat Davit)

4. Qt2501-0440(A) – H638 – Rev 2 (Fast Rescue Boat)

5. IMO RESOLUTION MSC.48(66) Adoption of the International Life-Saving Appliance

(LSA) Code

a. IMO RESOLUTION MSC.218(82) Amendments to the International Life Saving

Appliance (LSA) Code

b. IMO RESOLUTION MSC.425(98) Amendments to the International Life Saving

Appliance (LSA) Code

c. IMO RESOLUTION MSC.554(108) Amendments to the International Life Saving

Appliance (LSA) Code

6. IMO RESOLUTION MSC.81(70), Revised Recommendation on Testing of Life-

Saving Appliances

a. IMO RESOLUTION MSC.226(82), Adoption of Amendments to the

Revised Recommendation on Testing of Life-Saving Appliances, As Amended

b. IMO RESOLUTION MSC.274(85), Adoption of Amendments to the Revised Recommendation on Testing of Life-Saving Appliances

c. IMO RESOLUTION MSC.563(108), Amendments to the Revised Recommendation on Testing of Life-Saving Appliances

7. United States Code of Federal Regulations, Title 46 (Shipping), Chapter I, Subchapter W, Part 199, Subpart A.

8. Dwg. 354-C155-01 Rev. C, Trim & Stability Booklet, M/V Essayons

9. 354-D398-02 Structural Removals, Foundation Installations and Supporting Structure for New Rescue Boat Davit

B. LOCATION OF EQUIPMENT

Rescue Boat Davit, VESTDAVIT PLD-3600 – FR128-144, Port Side, Boat Deck

Fast Rescue Boat, Zodiac H608 – FR129-142, Port Side, Boat Deck

C. RATING OF EQUIPMENT

1. Quantity per ship – 1

2. Davit – Vest Davit PLD-3600, 3600 kg (7937 lbf) SWL, hydraulically operated, 50 m/min (164 ft/min) lowering/hoisting speed

3. Winch – Vest Davit C-273-3-V-S, hydraulically operated hoisting/lowering, disc brake, stepless speed control

4. Electric System – 440V, 60Hz, 70 kW,

5. Hydraulic System Information – Independent integrated hydraulic system, 85 L/min oil

354-D025-01 Sheet 4 of 15 flow, Working Pressure 280 bar, 560L system capacity.

6. Wire Rope – Galvanized, non-rotating wire rope, 16mm diameter

D. TEST PREREQUISITES

1. The fast rescue boat davit and all structural modifications shall be installed aboard the vessel in accordance with Ref. 9. All work must be complete before testing can commence.

2. The fast rescue boat must be available on-site for use in davit testing.

3. Electrical power to the fast rescue boat davit shall be installed and all components of the davit shall be commissioned (in accordance with the manufacturer’s instructions) and operational, including the following items provided separately from the davit:

a. HPU

b. Accumulator

c. Control Station

d. Starter Electrical Cabinet

E. TEST PREPARATION

1. Means shall be available for connecting the fast rescue boat to the davit after the conclusion of the Loaded Lowering Test.

2. Vessel shall be moored such that there is sufficient space for raising and lowering the fast rescue boat from the boat deck to the surface of the water.

3. Test weights of up to 7,920 kg (17,461 lbf) shall be made available for the static load testing of the davit and winch (without boat).

4. Test weights which can be distributed around the fast rescue boat, i.e. water bags, shall be available for additional load testing of davits and winches. Total weight required is approximately 735 kg (1,621 lbf). See test procedure for breakdown of weights required for each test.

5. Stopwatches or other means of determining the speed of the boat’s descent and ascent shall be available for test personnel.

F. TEST PRECAUTIONS

1. Testing of fast rescue boat davit involves the suspension of heavy loads in midair. All personnel involved with the test should take appropriate precautions to stand clear of any potential hazards resulting from the suspension of these loads.

2. The Davit Static Proof Load Test, the Loaded Lowering Test, and the Loaded Test shall be completed before beginning the Light Loaded Test. This ensures that the davit is properly attached to the vessel and that the fast rescue boat can be lowered safely before personnel enter the boat for the final portion of the Light Loaded Test.

During the light load test the operator inside the fast rescue boat shall be fitted with proper PPE as well as a personal flotation device (PFD).

354-D025-01 Sheet 5 of 15

3. During the Static Load Test, weights shall be rigged so as to be supported by the crane in the unlikely event that the davit or surrounding structure yields.

354-D025-01 Sheet 6 of 15

G. TEST PROCEDURE

1. Davit Static Proof Load Test (LSA Code 6.1.1.5, MSC.81(70) 2/6.1.1)

a. The fast rescue boat davit, in its full outboard position, shall be rigged to support a load equal to 2.2 times the working load. The davit shall support this load for a duration of 10 minutes.

b. For a working load of 3,600 kg (7,937 lbf), the test load shall therefore be

7,920 kg (17,461 lbf). This load shall be rigged such that it is supported by the davit, but not by the winch/brakes of the hoisting mechanism. Test weights shall be rigged so as to be supported by the crane in the unlikely event that the test causes the davit or surrounding structure to yield.

c. The appliance and its attachments should not deform or be damaged.

2. Loaded Lowering Test (Brake Test Only) (LSA Code 6.1.2.5.2, 6.1.2.10, 6.1.2.11; MSC.81(70) 2/6.1.5, 2/6.1.7)

a. The fast rescue boat davit shall be rigged with a load equal to the safe working load of the davit + 10% of the working load. The load should be released by the operation of the launching controls on deck.

Item Weight (kg) Weight (lbf) Working Load 3600 7937 +10% Working Load 360 794 Total Loaded Lowering Test Weight 3960 8731

b. When the load has reached its maximum lowering speed, the brake should be abruptly applied to demonstrate that the attachments of the davits and winches to the ship’s structure are satisfactory. The brake should be capable of stopping the descent of the rescue boat and holding it securely.

c. The maximum lowering speed of 1.3 m/s (4.27 ft/s), or that established by the Administration in accordance with LSA Code 6.1.2.10, should not be exceeded.

d. As the winch brake is exposed to the weather, the lowering test should be repeated with the braking surface wetted.

354-D025-01 Sheet 7 of 15

3. Hoisting Speed Test (VestDavit Harbour Acceptance Test Protocol (HAT))

a. The davit shall be loaded with a test weight equal to the max working load of the davit, 3600 kg (7937 lbf).

b. This load shall be raised from the waterline at a rate no more than 0.6 m/s (1.97 ft/s)

4. Loaded Test (LSA Code 6.1.2.8, 6.1.2.10, MSC.81(70) 2/6.1.2)

a. The fast rescue boat shall be loaded with its normal equipment or an equivalent mass and a distributed mass equivalent to that of the number of persons, each weighing 82.5 kg (182 lbf), it is permitted to accommodate. The boat should be released by operation of the launching control on deck.

Item Weight (kg) Weight (lbf) Light Boat 1765 3891 Full Fuel + Equipment 240 529 6 Persons @ 82.5 kg each 495 1091 Total Loaded Test Weight 2500 5512

b. The speed at which the survival craft is lowered into the water should not be less than 0.675 m/s (2.21 ft/s), as obtained from the formula:

S = 0.4 + (0.02H), or 1.0, whichever is less where:

S = speed of lowering (m/s)

H = 16.1 m (52.9 ft) = height of davit head to the waterline at the lightest seagoing condition (m).

The lightest seagoing condition is taken to be Condition 2 from the vessel’s Trim and Stability Book (Ref. 8), the operational lightship condition. This results in a mean draft of 14.69 ft in salt water.

c. The fast rescue boat shall be lowered through three cycles and the average speed determined over these three cycles shall be taken as the measured lowering speed for verification.

d. This test should be repeated with the HPU off to ensure safe operation using the hydraulic speed control handle as per the VestDavit HAT.

e. The maximum lowering speed of 1.3 m/s or as established by the

Administration should not be exceeded. The fast rescue boat’s entry to the water should not be harsh and should be deemed by all observers to be reasonable and safe.

354-D025-01 Sheet 8 of 15

5. Light Loaded Test (LSA Code 6.1.2.9, MSC.81(70) 2/6.1.3)

a. The fast rescue boat loaded with its normal equipment, or an equivalent mass of 2005 kg (4420 lbf), should be released by operation of the launching control on deck to demonstrate that the lifeboat’s mass is sufficient to overcome the frictional resistance of the winch, falls, blocks, and arresting gear.

b. The lowering speed shall be at least 70% of the full load minimum lowering speed. The calculated lowering speed for the full load condition is 2.21 ft/s.

Therefore, the minimum lowering speed for the Light Loaded Test is

1.55 ft/s. When the HPU is running, the lowering speed of the light boat should be no more than 0.6 m/s (1.97 ft/s) as per the VestDavit HAT.

c. The fast rescue boat shall be lowered through three cycles and the average speed determined over these three cycles shall be taken as the measured lowering speed for verification.

d. A person should then board the fast rescue boat and perform a test of the launching operation from within the boat.

6. Emergency Lowering Test & Remote Control Operation Check (VestDavit Harbor Acceptance Test Protocol (HAT) & LSA Code 6.1.2.2, MSC.81(70) 2/6.1.6)

a. Per the LSA code, ensure that the following are provided prior to commencing the test, and that all function properly during testing:

i. The mass on the control wire should be sufficient to overcome the friction of the various pulleys on the wire, when turning out the lifeboat from the stowed to the embarkation position

ii. It should be possible to operate the winch brake from within the fast rescue boat

iii. The winch brake should not be affected by the mass of the fully extended control wire

iv. There should be sufficient length of control wire available at the fast rescue boat, during all stages of lowering; and

v. Means should be provided to retain the free end of the control wire in the fast rescue boat until the boat is detached from the launching appliance by the operator.

b. Check that accumulator(s) have sufficient pressure. If necessary, charge the accumulators:

i. Accumulator on deck: > 230 bar

354-D025-01 Sheet 9 of 15

ii. Accumulator on davit: > 200 bar

c. Perform emergency swing-out and lower operation (per VD-TM-925071 PLD-3600 Technical Manual). The boat shall be in the stored position. The HPU shall be switched off.

i. Release all lashings.

ii. Gently open ball valve marked [2] on deck.

iii. Lift the boat just clear of the keel support with lever [WINCH HOIST]. Close the ball valve.

iv. Gently open the ball valve marked [3] on deck.

v. Enter the boat and gently open ball valve marked [4] on the davit.

vi. Pull the red triangle marked [EMERGENCY DAVIT OUT] to push the davit until the boat is clear of the shipside.

vii. Launch the boat by pulling the remote hand grip marked

[EMERGENCY LOWERING]

viii. Release the lifting ring/hook.

7. Recovery Test (LSA Code 6.1.1.8, 6.1.1.9, 6.1.2.6; MSC.81(70) 2/6.1.8, 6.1.10, 6.1.11, 6.1.12)

a. It should be demonstrated that the davit-launched fast rescue boat can be recovered to its stowage position by means of operating the hand gear and can be safely and properly secured.

b. Where davits are recovered by power, it should be demonstrated that the power is automatically cut off before the davit arms come against the stops in order to prevent overstressing the falls or davits.

c. It should be demonstrated that the fully equipped fast rescue boat can be recovered by means of a winch at a rate of no less than 0.8 m/s (2.62 ft/s), when loaded with a mass equal to that of the number of persons it is approved to carry, 1,621 lb, resulting in a fully-loaded boat weight of 2500 kg (5512 lbf).

8. Launch Test (MSC.81(70) 2/5.4)*

a. It should be demonstrated that the fully equipped rescue boat can be launched from a ship proceeding ahead at a speed of not less than 5 knots in calm water and on an even keel. There should be no damage to the rescue boat or its

354-D025-01 Sheet 10 of equipment as a result of this test. (*Note: May be performed during testing of the rescue boat itself).

H. DATA

1. Record all data listed on the attached data sheets and any other pertinent data available.

2. Check correspondence of nameplate data with that given in Paragraph C and note any discrepancies. Note any additional nameplate data that may be available on the equipment.

354-D025-01 Sheet 11 of 15

DREDGE ESSAYONS

RESCUE BOAT DAVIT TEST

DATA SHEET

Date: Weather Conditions:

Time:

G.1 Davit Static Proof Load Test Regulations: LSA Code 6.1.1.5, MSC.81(70) 2/6.1.1 Applied Load lbf

a. The fast rescue boat davit, in its full outboard position, shall be rigged to support a load equal to 2.2 times the working load. The davit shall support this load for a duration of 10 minutes.

b. For a working load of 3,600 kg (7,937 lbf), the test load shall therefore be 7,920 kg (17,461 lbf). This load shall be rigged such that it is supported by the davit, but not by the winch/brakes of the hoisting mechanism. Test weights shall be rigged so as to be supported by the crane in the unlikely event that the test causes the davit or surrounding structure to yield.

c. The appliance and its attachments should not deform or be damaged.

Test Duration minutes No Damage to Appliance Pass/Fail

No Deformation of Vessel Structure Pass/Fail Comments:

G.2

Loaded Lowering Test (Brake Test Only) Dry Wet Regulations: LSA Code 6.1.2.5.2, 6.1.2.11;

MSC.81(70) 2/6.1.5

a. Test Weight lbf

a. The fast rescue boat davit shall be rigged with a load equal to the safe working load of the davit + 10% of the working load. The load should be released by the operation of the launching controls on deck

b. When the load has reached its maximum lowering speed, the brake should be abruptly applied to demonstrate that the attachments of the davits and winches to the ship’s structure are satisfactory.

c. The maximum lowering speed of 1.3 m/s (4.27 ft/s) as established by the Administration should not be exceeded.

d. As the winch brake is exposed to the weather, the lowering test should be repeated with the braking surface wetted.

b. Descent Halted When Brake Applied Pass/Fail

Attachment of Davits/Winches to Structure Pass/Fail

No Permanent Deformation Pass/Fail

c. Lowering Speed < 4.27 ft/s Pass/Fail

354-D025-01 Sheet 12 of 15

RESCUE BOAT DAVIT TEST

DATA SHEET

G.3 Hoisting Speed Test Source: VestDavit HAT a. Test Weight lbf

a. The davit shall be loaded with a test weight equal to the max working load of the davit, 3600 kg (7937 lbf).

b. This load shall be raised from the waterline at a rate no more than 0.6m/s (1.97 ft/s)

b. Hoisting Speed < 1.97 ft/s Pass/Fail

G.4 Loaded Test

Regulations: LSA Code 6.1.2.8, MSC.81(70) 2/6.1.2 a. Rescue Boat Weight lbf

a. The rescue boat shall be loaded with its normal equipment or an equivalent mass and a distributed mass equivalent to that of the number of persons, each weighing 82.5 kg (182 lbf), it is permitted to accommodate. The boat should be released by operation of the launching control on deck.

b. The speed at which the survival craft is lowered into the water should not be less than 0.675m/s (2.21 ft/s).

c. The fast rescue boat shall be lowered through three cycles and the average speed determined over these three cycles shall be taken as the measured lowering speed for verification.

d. This test should be repeated with the HPU off to ensure safe operation using the hydraulic speed control handle as per the VestDavit HAT.

e. The maximum lowering speed of 1.3 m/s (4.27 ft/s) as established by the Administration should not be exceeded. The fast rescue boat’s entry to the water should not be harsh and should be deemed by all observers to be reasonable and safe.

Additional Test Weight Added lbf

b. Trial 1 Observed Speed ft/s Trial 2 Observed Speed ft/s Trial 3 Observed Speed ft/s

c. 2.21 < Observed Speed < 4.27 ft/s Pass/Fail

d. Functional With HPU Off Pass/Fail

e. Safe Entry Pass/Fail

354-D025-01 Sheet 13 of 15

RESCUE BOAT DAVIT TEST

DATA SHEET

G.5 Light Loaded Test

Regulations: LSA Code 6.1.2.9, MSC.81(70) 2/6.1.3 a. Rescue Boat Weight lbf

a. The rescue boat, loaded with its normal equipment or an equivalent mass of 2005 kg (4420 lbf), should be released by operation of the launching control on deck to demonstrate that the lifeboat’s mass is sufficient to overcome the frictional resistance of the winch, falls, blocks, and arresting gear.

b. The lowering speed shall be at least 70% of the full load minimum lowering speed. The calculated lowering speed for the full load condition is 2.21 ft/s. Therefore, the minimum lowering speed for the Light Loaded Test is 1.55 ft/s. When the HPU is running, the lowering speed of the light boat should be no more than 0.6 m/s (1.97 ft/s) as per the VestDavit HAT.

c. The fast rescue boat shall be lowered through three cycles and the average speed determined over these three cycles shall be taken as the measured lowering speed for verification.

d. A person should then board the fast rescue boat and perform a test of the launching operation from within the boat.

Additional Test Weight Added lbf Boat Descends in Light Condition Pass/Fail

b. Trial 1 Observed Speed ft/s Trial 2 Observed Speed ft/s Trial 3 Observed Speed ft/s

c. 1.55 < Observed Speed < 1.97 ft/s Pass/Fail

d. Successfully Lowered from Inside Boat Pass/Fail

354-D025-01 Sheet 14 of 15

RESCUE BOAT DAVIT TEST

DATA SHEET

G.6 Emergency Lowering Test & Remote Control Operation Check

Regulations: LSA Code 6.1.2.2, MSC.91(70) 2/6.1.6 a. i. Sufficient Mass on Control Wire Pass/Fail

a. Ensure that the following are provided prior to commencing the test, and that all function properly during testing:

i. The mass on the control wire should be sufficient to overcome the friction of the various pulleys on the wire, when turning out the lifeboat from the stowed to the embarkation position

ii. It should be possible to operate the winch brake from within the rescue boat

iii. The winch brake should not be affected by the mass of the fully extended control wire

iv. There should be sufficient length of control wire available at the rescue boat, during all stages of lowering; and

v. Means should be provided to retain the free end of the control wire in the rescue boat until the boat is detached from the launching appliance by the operator.

b. Check that accumulator(s) have sufficient pressure. If necessary, charge the accumulators:

i. Accumulator on deck: > 230 bar

ii. Accumulator on davit: > 200 bar

c. Perform emergency swing-out and lower operation (per VD-TM-925071 PLD-3600 Technical Manual). The boat shall be in the stored position. The HPU shall be switched off.

i. Release all lashings.

ii. Gently open ball valve marked [2] on deck.

iii. Lift the boat just clear of the keel support with lever [WINCH HOIST].

Close the ball valve.

iv. Gently open the ball valve marked [3] on deck.

v. Enter the boat and gently open ball valve marked [4] on the davit.

vi. Pull the red triangle marked [EMERGENCY DAVIT OUT] to push the davit until the boat is clear of the shipside.

vii. Launch the boat by pulling the remote hand grip marked

[EMERGENCY LOWERING]

viii. Release the lifting ring/hook.

ii. Brake Operable from Within Boat Pass/Fail

iii. Winch Brake Unaffected by Control

Wire Pass/Fail

iv. Sufficient Length of Control Wire Pass/Fail

v. Means of Control Wire Retention Pass/Fail

b. i. Accumulator on deck > 230 bar bar

ii. Accumulator on davit > 200 bar bar

c. Emergency Swing-Out and Lowering

Pass/Fail

354-D025-01 Sheet 15 of 15

DATA SHEET

G.7 Recovery Test

Regulations: LSA Code 6.1.1.8, 6.1.1.9, 6.1.2.6;

MSC.81(70) 2/6.1.8, 6.1.10, 6.1.11, 6.1.12

a. Rescue Boat Weight lbf Additional Test Weight Added lbf

a. It should be demonstrated that the davit-launched rescue boat can be recovered to its stowage position by means of operating the hand gear and can be safely and properly secured.

b. Where davits are recovered by power, it should be demonstrated that the power is automatically cut off before the davit arms come against the stops in order to prevent overstressing the falls or davits.

c. It should be demonstrated that the fully equipped fast rescue boat can be recovered by means of a winch at a rate of no less than 0.8 m/s (2.62 ft/s), when loaded with a mass equal to that of the number of persons it is approved to carry, 2500 kg (5512 lbf)

Boat Recovered Using Hand Gear Pass/Fail

b. Power Cutoff Pass/Fail

c. Test Weight lbf Observed Speed > 2.62 ft/s Pass/Fail

Comments:

G.8 Launch Test* Regulations: MSC.81(70) 2/5.4 a. Ship Speed kts

a. It should be demonstrated that the fully equipped rescue boat can be launched from a ship proceeding ahead at a speed of not less than 5 knots in calm water and on an even keel. There should be no damage to the rescue boat or its equipment as a result of this test.

Rescue Boat Launched Pass/Fail Free of Damage Pass/Fail

Notes (add additional sheets as necessary):