The Maritime Safety Committee
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.566 – Provisional Guidelines on the Conduct of Trials in which the Officer of the Navigational Watch Acts as the Sole Look-out in Periods of Darkness – (Adopted on 2 July 1991) - The Maritime Safety Committee

The Maritime Safety Committee

  1 The Maritime Safety Committee at its fifty-ninth session (13 to 24 May 1991) approved provisional Guidelines for the conduct of trials in which the officer of the navigational watch acts as the sole look-out in periods of darkness (MSC 59/33, paragraph 11.23).

  2 As requested by the Committee, the attached provisional Guidelines are brought to the attention of Member Governments.

  3 The provisional Guidelines should be considered as guidance for uniform application and not as an authorization or as a basis for equivalent arrangements for unrestricted application

  4 With respect to passenger ships and ships carrying oil, gas and chemicals in bulk, the Committee recommends that Administrations defer participation by such vessels in trials under the provisional Guidelines pending consideration by the Committee of the results of trials with ships engaged in other types of service.

  5 Trials authorized in accordance with the provisional Guidelines should not be conducted in waters subject to the jurisdiction of a Government which has informed the Organization of its objections to such trials.

  6 When ships of less than 1,600 grt cannot comply with the guidelines, Administrations should consider arrangements that provide a level of safety that is at least as effective as that prescribed by the provisional Guidelines.

  7 Reports of the results of trials conducted in accordance with the provisional Guidelines, including preliminary progress reports, may be submitted directly to the Sub-Committee on Safety of Navigation and to the Sub-Committee on Standards of Training and Watchkeeping for their information. Such reports should be submitted in sufficient time to ensure they are taken into consideration when the above sub-committees are scheduled to evaluate the trials and consider the need for revision of the provisional Guidelines.


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