The preparation of operation plans, which had been laid down in WPL-42 and in Navy Basic War Plan, RAINBOW No. 3 (PL-44), the latter having been promulgated in December 1940 was continued and on 16 March 1941 the first Operation Plan: North Atlantic Naval Coastal Frontier Plan 0–4 (RAINBOW 3), with the short title, NA-NCF-44 was issued. This Plan set up the proposed Staff of the Commander, North Atlantic Naval Coastal Frontier, which consisted of the following: Chief of Staff, Operations Officer, Shipping Control Officer, Air Officer, First Army Liaison Officer Intelligence Officer and Communication Officer. It also provided for the Command Relations and the plans for coordination with the Army Commander. Nevertheless, at this time, no officers were immediately available to fill these commands.