Sea trial inspection

Sea trial inspection and seaworthiness

The purposes of dry-docking and sea trial inspection not only to in meeting with its class but also all to buyer's satisfaction in period of delivery

Deep understand the methods and procedures of conducting sea-trial inspection and seaworthiness tests

The experience and familiar with a lot of scopes were done by  AIM Control (AIM Group®)

Sea trials are carried out after the dock tests to demonstrate proper operation.

Motor Vessels Sea Trials inspection services

Codes and range perform tasks related to one ship inspection and seaworthiness tests according to the requirements of relevant ordinances.

Competency performance requirements of Standards of sea-trials and the details of exemption criteria for sea -trials, such as:

Scope of tests

• Items for sea trials and seaworthiness tests

• Methods and procedures of conducting

• Arranging the tests to be conducted under the surveillance of a surveyor Submitting required documents, on the scope of tests and records of parameters

• Performing all the required items, such as adjustment and control of the conditions for testing and demonstration of the normal functioning of the main and auxiliary machinery, according to ship classes and test requirements

• Testing whether the service speed meets the requirement, and checking the propulsion in the case of failure of major auxiliary units

• Conducting navigation and steering tests, such as astern trials and zigzag movements

• Testing boilers, diesel engines (of different power/speed) and turbines

• Performing inspection of machinery after sea trials, including all the propulsion machinery and the components that do not meet the test requirements

• Professionalism conduct checks and tests for ships as required by dockyards, ship owners and contracts

• Compile detailed reports on results of ship inspection and make recommendations

Assessment Criteria Remarks

the presumption AIM Control (AIM Group®) marine surveyors, maritime experts and consultant as Master, Captain and Chief Engineer, shipyard quality controller who already possesses basic and deep experience marine knowledge “Hull Marine inspection and ship survey stability examination”.

 AIM Control (AIM Group®) Sea trials jobs are carried out after the dock tests to demonstrate proper operation of the main and auxiliary machinery, including monitoring, alarm and safety systems, under realistic conditions. The trials are also to demonstrate that any vibration which may occur within the operating speed range is acceptable, the following:

• The arrangements and number of starts of the main engine.

• The ability of the machinery to reverse the direction of thrust of the propeller in sufficient time, and so bring the ship to rest from maximum service speed.

• Where controllable pitch propeller is fitted, the free route astern trial is to be carried out with the propeller blades set in the full pitch astern position.

• In geared installations, prior to full power sea trials, the gear teeth are to be suitably coated to demonstrate the contact markings, and on conclusion of the sea trials, all gears are to be opened up sufficiently to make for an inspection of the teeth.

AIM Guidelines for Sea Trials of Motor Vessels.

Technical Specification:

1. Speed trials and manoeuvring trials should be made with no wind and sea as still as possible.

2. Manoeuvring trials are to be performed according to the IMO Res. Res. MSC.137(76) “Standards for Ship Maneuverability”, and will be carried out for the first ship only.

3. The scope of the sea trials and inspections after sea trials will be specified in the Sea Trial Program that is to be prepared by the Shipyard and submitted for Owners approval 2 months before sea trials.

4. Sea trials will be carried out when all dock tests are completed with positive results. In a justified case agreed with Owners, a dock test can be carried out during sea trials.

5. The Shipyard is to give Owners and Class Society a three-week notice of the date of sea trials and to confirm it seven days before the date.

6. Speed trials are to be performed in sufficient deep water.

7. Noise and vibration measurements will be carried for all ships. However, in case of good results on the first ship, these measurements can be suspended by Owners for the sister ships.

8. In case of any breakdown that can be repaired at sea, sea trials shall be continued after repairs and remain valid in all respects.

9. Unsuccessful sea trials will be repeated when faults/claims are rectified, within a scope necessary to confirm that corrections are made properly.

10. After finishing sea trials, the Shipyard shall prepare the document entitled Sea Trial Results.

11. the operating certificates and Protocal, Interntory & Class documents, Stability Booklet, Fitted drawing list, Experiment reports

12. the vessel clean and operational

13. the engine room bilges clean and free of oil

14. The concerned parties about the ship

15. the waterline clean of growth

16. the vessel "ship shape" or are there items, tools, machinery and equipment

17. The initial reaction when AIM’s sea trail surveyor firstly identifies the vessel

Document

Diagram of Bilge System, Sanitary Domestic FW System, Fuel Oil System, Fuel Oil System, Filling, Sounding & Air Vent Piping System, Exhaust Piping System, Cooling Water System, Fire Main System, Arrangement and Detail of Shafting, Rudder Plan, Engine Room Arrangement, Steering System-Owner's Operation , Installation Manual, Engine Room Vent System, Propeller Plan, GRP Pilot Launch, Load analysis, Battery List, Electrical equipment arrangement, Electric System One line Diagram and etc. 

AIM Control (AIM Group®) surveyors are always writing a brief report in best recollection of the good and bad points of the ship.

Standby for Sea-trial inspection services

1. Only Experienced Personnel Should Handle Machinery Systems
2. Masters Must Take All Proper Permissions
3. Inform AIM's Surveyor
4. Workshop In-charges To Be Present On Ships
5. Sufficient Manpower for Inspection
6. Prepare a List of Overhauled Machinery
7. Check Alarms And Trips Are Working:
8. Ensure LSA and FFA are in Proper Working Condition
9. Take Enough Evidence
10. Make Proper Checks Before Clearing Any Machinery.

Contact AIM Control (AIM Group®)