When it is necessary to move submarines or large vessels to or from the Dockyard Port it becomes necessary to prescribe additional restrictions to those, which operate within a Port normally. These restrictions are contained fully within the “Clyde Dockyard Ports of Gareloch and Loch Long Act 1967” (also contained within Appendix IV to the Admiralty Sailing Directions (West Coast of Scotland Pilot)).

When the following signals are displayed, no vessels shall enter the waters of the area concerned. Any vessel within the area whether underway or at anchor must leave immediately. The areas and signals are displayed on Admiralty Charts.

Three green lights vertically disposed, supplemented by International Code Pendant 9 by day:

These signals are displayed prominently at the area and tugs or patrol craft in the vicinity.

A red light above two green lights vertically disposed, supplemented by a red rectangular flag with a white diagonal bar by day:

Lights

Flag

These signals will be displayed at:

Faslane

Rhu Hard

The DG Range Building adjacent to Green Isle

The Navy Buildings Greenock

Tugs and patrol craft in the vicinity.

Whilst these signals are displayed the Rhu Narrows are closed . A fuller explanation of all the prohibited activities is contained in Appendix IV to the Admiralty Sailing Directions (West Coast of Scotland Pilot)

If entering the Gareloch or Loch Long at any time or if in doubt, contact is to be made with the QHM Duty Controller on VHF Channel 73 or 01436 674321 (Extn 3555).