Lifeboat Davit Test & Inspection on Ship (Part 1)

These guidelines define the onboard test for the Lifeboat Davit Gravity Type

PURPOSE
This article aims at confirming the satisfaction required by the Ship Owner/Ship Classification through the onboard test for the lifeboat.

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GRAVITY TYPE LIFEBOAT TEST METHOD

1- Preparation 20˚ heeling test
Prepare 20˚ heeling test using a chain block before the inspection.

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Use an angle gauge to check the davit beam condition considering 20˚ heeling (angle = davit turning angle – 20˚)

2- 20˚HEELING TEST
Check any touch to the shell plate while lowering the boat in 20˚ heeling condition.

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Check any interference to the shell plate while lowering the boat in 20˚ heeling condition

3- LOWERING TEST
Check the lower speed while lowering the boat after loading the following weight. (Measure time with a stopwatch using a 10m rope)

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*  LIFEBOAT: WEIGHT = BOAT WEIGHT WITH EQUIPMENT + 3 PERSON WEIGHT 

*  FOR RESCUE BOAT: WEIGHT = BOAT WEIGHT WITH EQUIPMENT + 6 PERSON WEIGHT SPEED = MIN:S1 ~ MAX:1.3m/sec, S1:0.4+(0.02×H(HEIGHT TO WATER LEVEL FROM DAVIT HOOK))

4- Check the hoisting speed and brake test while lifting up the boat. Test the limit switch and move to the loading position with the manual lever.

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Check limit switch and manual lever in RED circle

*   LIFEBOAT: WEIGHT = BOAT WEIGHT WITH EQUIPMENT + 3 PERSON WEIGHT

* RESCUE BOAT: WEIGHT = BOAT WEIGHT WITH EQUIPMENT + 6 PERSON WEIGHT SPEED≥0.3m/s

5- The lowering and brake test shall be done with the use of a remote control line by a crew under the launching test and sea trail full load condition (including the minimum boarding passenger for the boat). Carry out the sealed trail after the breakaway of hook release after starting the boat on the sea level (for 10 minutes)

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For the Freefall type, please come to Part 2: Lifeboat Davit Test & Inspection on Ship (Part 2)

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