Questions and Answers.

In your website on Sea Slug you make no mention of the NK1 motor which most sources (including Wikipedia) state as being the liquid fuelled sustainer motor for the Mk1 missile. Why is this?

Merchant of Light.

Hello Merchant of Light,
Seaslug grew out of the LOP/GAP (Liquid Oxygen & Petrol Guided Anti-Aircraft Project). As its name implies it was to have used liquid oxygen and petrol (gasoline for our American readers) as the fuel. This combination, however, was never used in British service and concentrated hydrogen peroxide (High Test Peroxide or HTP) with paraffin (kerosine) was the preferred liquid fuel. This combination was used (as was nitric acid and methanol) on the test vehicles that formed the beginning of the Seaslug project as it was felt that waiting for a suitable solid-fuelled sustainer motor would delay the project. In the event other delays meant that IMI had sufficient time to develop a reliable motor; this was Foxhound and it was used on all Mk1 missiles.


Like your page on the Seaslug.
Is there any chance of some detail on the operations room layout, radar displays, and how an engagement of a radar target took place?


I still cannot get to the National Archives due to Covid-19 but I have had another look at my notes and photographs and should be able to put up a page on the ops room soon.

Best Regards,

Update: I have been able to put some photographs and accompanying text at the County Class Ops room.


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Last updated: 17th December 2022.
Copyright SR Jenkins, July 2012.