Section 2 Requirements

2.1.1 Watertight doors below the level of watertight integrity are to comply with the requirements of Vol 1, Pt 3, Ch 4, 4 Watertight doors and hatches in watertight subdivision boundaries and Vol 2, Pt 9, Ch 9, 6.1 Watertight doors and hatches 6.1.1. An additional requirement over and above the requirements of Vol 2, Pt 9, Ch 9, 6.1 Watertight doors and hatches 6.1.1 is that there is to be no single point of failure in the door control system or power operating system. For this purpose an FMEA or other satisfactory means of demonstrating compliance is to be submitted.

2.1.2 Watertight doors are to indicate to a manned central control station and other control stations as required by the Naval Administration.

2.1.3 Watertight doors are to be clearly marked in accordance with the procedure specified in Vol 3, Pt 2, Ch 6, 1.2 Documents required for design review 1.2.2.(b), stating that the appropriate authority is to be sought prior to operation of the door.

2.1.4 All main watertight subdivision compartments are to be fitted with means of water ingress detection. Water ingress is to be indicated at all main control stations and a suitable audible alarm is to be provided. The number and location of flooding detection sensors is to be sufficient to ensure that any substantial water ingress into a main subdivision compartment is detected under reasonable angles of trim and heel.

2.2.1 LR will verify compliance with the agreed subdivision and damaged stability standard. Where alternative arrangements or non-compliances with the agreed standard occur, they are to be recorded in the tailoring document, see Vol 1, Pt 1, Ch 2, 3.2 Tailoring – Departures from the Rules and Rule additions.

2.2.2 The definitions of damage for the assessment of the RSA2 notation are to include damages which are consistent with the compartment damage criteria specified by the subdivision and damaged stability standard, see Vol 1, Pt 4, Ch 2 Military Load Specification.

2.3.1 LR will verify compliance with the agreed intact stability standard. Where alternative arrangements or non-compliances with the agreed standard occur they are to be recorded in the tailoring document, see Vol 1, Pt 1, Ch 2, 3.2 Tailoring – Departures from the Rules and Rule additions.

2.4.1 The results of the sea-keeping analysis or model test are to demonstrate that the predicted RMS motions, deck wetness, Motion Induced Interruptions (MII) and Motion Sickness Incidences (MSI) for the design are within the limits specified in STANAG 4154 or another specified standard. Values are to be predicted or recorded at the following locations as a minimum, where applicable:

• Navigation bridge.
• Machinery control room.
• Flight deck.
• RAS operating positions.
• Well-deck.

2.4.2 Work stations are to be fitted with suitable arrangements, e.g. handholds/seatbelts/harnesses to enable the crew to perform their duties when adverse ship motions occur. The fittings and their supporting arrangements are to be to the Surveyor’s satisfaction.

2.4.3 Where safety points for attaching harnesses are provided on board they are to be selected from, and installed in accordance with, an appropriate standard (e.g. BS EN 795). A Register of safety points is to be produced at build and maintained in service. A procedure for the visual inspection of safety points by a Responsible Person is to be developed and confirmed as being implemented. As a minimum the procedure is to:

• Define the standard or applicable legalisation which is used to define a Responsible Person;
• Nominate an appropriate Responsible Person or persons;
• Detail any training which the Responsible Person is to receive;
• Detail any qualifications which the Responsible Person is to hold;
• State that safety points are to be inspected by a Responsible Person at least every 12 months;
• Mandate that a record is kept of when each safety point was last inspected and by whom;
• Authorise the Responsible Person to request that the safety point be load tested in accordance with the applicable standard;
• Authorise the Responsible Person to remove the item from service should they consider it appropriate to do so.

2.4.4 Guard rails, handrails and safety points are to be visually inspected and tested through life at intervals specified by the Naval Administration. The tests are to be undertaken by a Responsible Person in accordance with an appropriate standard agreed with the Naval Administration.

2.4.5 A log of visual inspections and testing is to be maintained on board the vessel and updated by the Responsible Person. Where guard rails, handrails or safety points are found to be deficient, the deficiency is to be reported to the appropriate maintainer. At Annual Survey the Surveyor is to satisfy themself that the visual inspection and testing is being undertaken and that the log is being updated appropriately.

2.5.1 A Stability Information Book is to be provided on board containing the following information:

1. The stability standard or requirements;

2. General precautions against capsize;

3. Loading and operating restrictions;

4. Cross-flooding arrangements [if fitted];

5. Verification of compliance with the stability standard;

6. Trim and draught limitations;

7. Free surface effects;

8. Payload heeling effects;

9. Loading and unloading precautions;

10. Securing arrangements;

11. Control of openings;

12. Loll;

13. Hull strength;

14. Stability or loading computer [if fitted];

15. Non sailing conditions [if applicable];

16. Particulars of the ship;

17. Details of the lightship and its derivation;

18. Details of hydrostatics and cross curves of stability;

19. Capacity and centroid of tanks, stores and cargo spaces plus other payload data;

20. Example calculations of stability;

21. Example ship conditions compliant with stability requirements;

22. Damage stability information demonstrating ship survivability following foreseeable, extreme and catastrophic damage; and

23. Methods to recover margins of buoyancy and stability.

2.5.2 Information regarding ship operations in heavy weather or during manoeuvres shall be provided on board.
The information shall contain as a minimum:

1. The risk of broaching;

2. The shipping of green seas;

3. Slamming;

4. Heel in turn characteristics;

5. The impact of motions on the safety of the crew and essential safety functions;

6. Practices or methods specific to the vessel to reduce the impact of motions on the safety of the crew and equipment;

7. The effects of squat and manoeuvring in shallow water;

8. The effects of wind on manoeuvring; and

9. The minimum manoeuvring speed.

2.5.3 Information on dry-docking the ship shall be provided on board. The information provided shall be consistent with Vol 1, Pt 3, Ch 5, 11.4 Dry-docking loads and contain as a minimum:

1. The location of dock blocks and lightship weight distribution;

2. The location of discharges, shore connections and appendages; and

3. Information for maintaining stability throughout the drydocking process.