SOLAS Ch V - Regulations
1. Application
2. Definitions
3. Exemptions & Equivalents
4. Navigation Warnings
5. Meteorological Services & Warnings
6. Ice Patrol Services
7. Search & Rescue Services
8. Life-Saving Signals
9. Hydrographic Services
10. Ship's Routeing
11. Ship Reporting Systems
12. Vessel Traffic Services
13. Aids to Navigation
14. Ships' Manning
15. Bridge Design
16. Maintenance of Equipment
17. Electromagnetic Compatibility
18. Navigational Systems & Voyage Data Recorder
19. Shipborne Navigation Systems
20. Voyage Data Recorders
21. International Code of Signals
22. Navigation Bridge Visibility
23. Pilot Transfer Arrangements
24. Use of Heading/Track Control Systems
25. Electrical Power
26. Steering Gear
27. Charts & Nautical Publications
28. Records of Navigational Activities & Daily Reporting
29. Distress Signals
30. Operational Limitations
31. Danger Messages
32. Information Required in Danger Messages:
33. Distress Situations
34. Safe Navigation
34-1 Master's Discretion
35. Misuse of Distress Signals
Regulation Appendix
A1. Categories of Waters & Classes of Ships
A2. Table of Requirements for Ships
A3. Nautical Charts & Publications
A4. WMO Maritime Services
A5. Routeing Systems
A6. Safe Manning
A7. Equipment Manuals
A8. Performance Standards & Type Approval
A9. Performance Standards for Navigational Equipment
A10. Voyage Data Recorders
A11. Navigation Equipment - New Ships
A12. Navigation Equipment - Existing Ships
A13. Magnetic Compass
A14. Electronic Charts
A15. Radar Reflectors
A16. Radar Equipment
A17. Automatic Identification Systems
A18. Steering Gear, Heading & Track Control Systems
A19. High Speed Craft Code
A20. Inspection & Survey of Navigational Equipment
A21. Pilot Transfer Arrangements
A22. Recording of Navigational Events
A23. Passenger Ship Operational Limitations
A24. Voyage Planning
A25. Guidelines for Voyage Planning
Regulation 9 - Hydrographic Surveys


  • Contracting Governments' obligations in providing hydrographic services.
Regulation 9

Contracting Governments undertake to arrange for the collection and compilation of hydrographic data and the publication, dissemination and keeping up to date of all nautical information necessary for safe navigation.



In particular, Contracting Governments undertake to co-operate in carrying out, as far as possible, the following nautical and hydrographic services, in the manner most suitable for the purpose of aiding navigation:

2.1 to ensure that hydrographic surveying is carried out, as far as possible, adequate to the requirements of safe navigation;
2.2 to prepare and issue nautical charts, sailing directions, lists of lights, tide tables and other nautical publications, where applicable, satisfying the needs of safe navigation;
2.3 to promulgate notices to mariners in order that nautical charts and publications are kept, as far as possible, up to date; and
2.4 to provide data management arrangements to support these services.



Contracting Governments undertake to ensure the greatest possible uniformity in charts and nautical publications and to take into account, whenever possible, relevant international resolutions and recommendations.*


4. Contracting Governments undertake to co-ordinate their activities to the greatest possible degree in order to ensure that hydrographic and nautical information is made available on a world-wide scale as timely, reliably, and unambiguously as possible.

* Refer to the appropriate resolutions and recommendations adopted by the International Hydrographic Organization


MCA Guidance
1. This is a new Regulation. Contracting Governments are required to cooperate in compiling and propagating hydrographic data and providing services, which include adequate hydrographic surveying, issuing of charts and nautical publications and promulgating notices to mariners. They must provide data management for these services.

Emphasis is placed on uniformity, and on compliance with the resolutions and recommendations of the International Hydrographic Organization (IHO)

3. In the UK the Committee on Shipping Hydrography (COSH) advises on the hydrographic survey priorities of the UK Civil Hydrography Programme (CHP) to ensure that the UK waters are surveyed to modern standards. The CHP is administered by the MCA. The parent Civil Hydrographic Review Committee (CHRC) sets the survey priorities and approves the expenditure. The MCA has a Memorandum of Understanding with the UKHO, which covers the preparation, publishing and updating of hydrographic products in UK waters and the provision of the national co-ordinator for navigational warnings.
4. Mariners are requested to inform the UKHO immediately when new dangers or changes / defects in aids to navigation are identified. Full contact details and instructions, together with copies of the UKHO reporting form (Hydrographic Note-H.102) are provided in the weekly copy of the edition of the Admiralty Notices to Mariners.

Notices to Mariners Website:
Fax: +44(0)1823 322352
Tel: +44(0)1823 723315

Urgent navigational information - e-mail:

Other navigational information - e-mail:


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