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SAM ALUMINIUM PTE LTD

Prepared by Marg Lim on 06/09/06 P0540-G10 Rev 0

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36m Utility Crewboat

INCLINING EXPERIMENT PROCEDURE

1. The inclining experiment shall be carried throughout in a favourable weather and sea

condition.

2. The vessel shall be arranged as near to lightship as possible.

3. Whenever possible, all items onboard not intended for lightship shall be removedoverboard, otherwise they shall be positioned at vessels centreline and their weights,LCGs, and VCGs shall be assessed and recorded. All items for the lightship that werenot installed, shall be placed onboard the vessel at their respective position andtemporary secured if required, otherwise they shall be assessed and recorded.

4. All bilges shall be dried. Wherever practicable, all other tanks and void spaces onboardshall be either 100% full or completely dried. Prior to the start of the experiment, all

tanks with their contents shall be sounded and recorded, and all other emptied tanksshall be opened for inspection.

5. The number of personnel onboard shall be kept to the minimum and their respectivepositions recorded. No personnel onboard shall be allowed to move transversely acrossthe vessel when taking the draft marks and pendulum deflection readings. Wheneverpossible, all personnel onboard shall position themselves at the vessels centrelinebefore the readings were taken.

6. All mooring ropes shall be slackened such that the vessel floats freely when takingreadings.

7. Draft readings and their locations shall be recorded prior to the start of the experiment.

8. It is recommended that at least five freeboard readings, approximately equally spaced,be taken on each side of the vessel or that all draft marks (forward, midship and aft) beread on each side of the vessel. Where draft marks are used for the measurement, thedraft marks shall be verified by surveyor prior to the inclining experiment.

9. A plot of heeling moments versus tangent of heeling angles should be verified by thesurveyor. If the results are not satisfactory, the surveyor may request that the experimentbe repeated.

10. The specific gravity of the seawater shall be recorded prior to the start of the experiment.

11. The estimated total inclining weights is 8 tonnes and they shall be placed onboard onthe main deck. They shall be divided into four groups; two groups, B & A, shall beplaced on port side and two other groups, D & C, shall be placed on starboard side.They shall be placed as near to the handrail as possible to give the maximum transversespread, and in staggered position, so that the weights can be moved transversely acrossthe beam of the vessel. Their initial positions shall be marked on the main deck withchalk and their weights, LCGs, and VCGs shall be recorded. When returning the weightsafter shifting, they shall be placed onto their original marked position.


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SAM ALUMINIUM PTE LTD

Prepared by Marg Lim on 06/09/06 P0540-G10 Rev 0

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12. The inclining weights shall be of certified type, otherwise they shall be weighed with amost recent certified/calibrated weighing machine.

13. Breakdown of the weights :-

GroupNo.

Weight(tonnes)

BlockName

Location Spread (M) Remarks

B 2.00 - Port - Fr.15 5.00

A 2.00 - Port - Fr.19 5.00

D 2.00 - Stbd - Fr.17 5.00

C 2.00 - Stbd - Fr.21 5.00

14. Movement of weights and the expected pendulum deflections :-

Shift No. WeightDistribution (t)

Weight Shifted(t)

Anticipated TotalPendulum Deflection

Remarks

Port Stbd Port Stbd mm tan

0 4.00 4.00 B,A D,C - -

1 2.00 6.00 B D,A,C 88 0.0160

2 - 8.00 - B,D,A,C 176 0.0320

3 2.00 6.00 B D,A,C 88 0.0160

4 4.00 4.00 B,A D,C - -

5 6.00 2.00 B,A,C D 88 0.0160

6 8.00 - B,D,A,C - 176 0.03207 6.00 2.00 B,A,C D 88 0.0160

8 4.00 4.00 B,A D,C - -

15. Two pendulums shall be arranged at or near the vessels centreline, the forwardpendulum at Fr.42.5 on main deck and the aft pendulum at Fr.5 on the main deck.Length of the pendulums shall be at least 5.50 metres long. The suspended bobs shallbe immersed in a trough of mixture of dirty oil and seawater. A third means of measuringthe inclination is recommended in case of marked differences in the measurements oftwo pendulums.

16. Care shall be exercised when taking pendulum deflection readings that the bob must befreely suspended from resting or touching the bottom of the trough, and the string fromresting or touching on the marking batten or adjacent walls or protruding objects.

17. The anticipated pendulum deflections are 0.918 and 1.836 degrees respectively for thefirst two shifts. The anticipated maximum deflection is 176 mm.

18. The initial list of the vessel shall not exceed 0.5 degrees and the trim shall be maintainedat less than 1 percent of the LBP. Trim by bow shall be avoided.

19. The depth of the water under the hull shall be sufficient to ensure that the hull is entirelyfree at the bottom at maximum inclination.


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