Section 2 Annual Surveys - Hull and machinery requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 1 Regulations - Chapter 5 Periodical Survey Regulations for Amphibious Air Cushion Vehicles (ACV) - Section 2 Annual Surveys - Hull and machinery requirements

Section 2 Annual Surveys - Hull and machinery requirements

2.1 General

2.1.1 Annual Surveys are to be held concurrently with any relevant statutory annual or other statutory surveys, wherever practicable.

2.1.2 The Surveyor is to audit the approved planned maintenance scheme. The records will be checked and the satisfactory operation of the scheme verified. Condition monitoring data will be reviewed and trends analysed.

2.1.3 The Surveyor is to examine the Log Book to verify that a proper record has been kept in respect of servicing, maintenance and overhaul requirements for those aspects not covered by the approved planned maintenance scheme.

2.1.4 Certification for replacement units/parts will be required.

2.2 Preparation

2.2.1 The ACV is to be slung or jacked up to permit a thorough inspection of all underside parts, fittings and attachments.

2.2.2 Panelling, floor coverings etc. need not be removed at these surveys, unless they are of portable type or unless the Surveyor has reason to suspect they may conceal significant damage.

2.3 Hull items

2.3.1 The Surveyor is to be satisfied as to the efficient condition of the following items:

  1. Bottom and side plating, any external stiffeners, and side walls or skirts, including flexible keels, if any.

  2. Weather doors, ventilators, windows and emergency or other hatches.

  3. Weather decks, houses, etc.

  4. Machinery casings and seats.

  5. Anchoring and mooring equipment when required by the Rules.

  6. Fire equipment including fire detection, alarm systems and means of escape , where the survey of such items is not covered by statutory certification.

  7. Where applicable, passenger seat foundations and cargo tie down points.

  8. Skirt attachment and operating mechanisms.

  9. Air propeller shroud structures.

  10. Side body attachments and supports (when fitted).

  11. Operation of ramps, and their closing and locking arrangements.

  12. The structural attachment and retention arrangements for external fuel tanks (when fitted).

2.4 Machinery items

2.4.1 The Surveyor is to be satisfied as to the efficient condition of the following items:

  1. Fuel tanks and associated fuel system with pumps, filters, etc.

  2. Lubricating oil tanks and associated lubricating system with coolers, pumps, filters, etc.

  3. The bilge pumping system.

  4. Machinery alarm arrangements.

  5. The electrical machinery, the switchgear and other electrical equipment are to be generally examined under operating conditions so far as practicable. The satisfactory operation of the emergency source of power, including the automatic controls as fitted, is to be verified.

  6. Hydraulic, electrical and pneumatic control systems, including steering, are to be examined under operating conditions.

  7. Engine starting arrangements.

  8. All drive belts, associated running surfaces and tension adjustment (where fitted).

  9. Air propellers, including (where fitted) hub assemblies, servos and actuating equipment of controllable pitch propellers.

  10. The overall operation of the machinery including propulsion and lift machinery. A machinery proving trial of short duration is to demonstrate to the Surveyor the satisfactory operation of the machinery.


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