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Old 03-10-2017, 14:51
rovarch rovarch is offline
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Default Navigational Lights and regulations UK Ships WWII Convoys

What were the rules regarding the display of navigational lights on UK ships during WWII convoys.

Many thanks

Last edited by rovarch : 03-10-2017 at 15:17.
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Old 03-10-2017, 19:54
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mandrake079 mandrake079 is offline
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Default Re: Navigational Lights and regulations UK Ships WWII Convoys

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Originally Posted by rovarch View Post
What were the rules regarding the display of navigational lights on UK ships during WWII convoys.

Many thanks
Article 50 of CB 04234 (1) - Atlantic Convoy Instructions dated Sep 1942 (amended up to Aug 1944) states:
Navigation Lights to be Exhibited by Merchant Vessels

1. The Commodore of the convoy should issue orders for the convoy with regard to the use of navigation lights. The stern light is always to be exhibited when navigation lights are ordered to be shown, except that rear ships of columns should not show their stern lights unless other ships are joining up astern of the convoy.

2. Detailed instructions affecting navigation lights exhibited by ships in convoy and those routed independently are contained in C.B. 03058 (Instructions for Commodores of Convoys), Confidential Admiralty Merchant Shipping Instructions and O.U. 5539, "Mersigs". See also Section 5, Article 432 of these instructions.

Article 413 of CB 04234 (5) - Atlantic Convoy Instructions to Escorts dated Aug 1944 (amended up to May 1945) differs slightly:
Navigation Lights to be Exhibited by Merchant Vessels

1. The Commodore of the convoy will issue orders to the convoy with regard to the use of navigation lights. The stern light is always to be exhibited when navigation lights are ordered to be shown, except that rear ships of columns should not show their stern lights unless other ships are joining up astern of the convoy.

2. Detailed instructions affecting navigation lights exhibited by ships in convoy are contained in C.B. 03058 (Instructions for Commodores of Convoys). For Merchant Ships sailing independently details are included in the routing instructions issued to Masters, amended as necessary by BAMS messages to the area concerned.

3. On approach of suspicious aircraft or on receipt of an air raid warning, ships burning navigation lights in permitted areas should extinguish them, but this does not prohibit their exhibition, should risk of collision arise.

These two CBs can be found at The National Archives (ADM 239/344 and 239/245 respectively). I'm afraid I don't have a copy of CB 03058 referred to above which is available as ADM 239/207.

Ted
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