Hans Houterman, one of the founders of an excellent website, World War II Unit Histories & Officers, has very kindly forwarded me more precise details of the officers I mentioned in an article "What do we know about HMS Rushen Castle's first crew?" - indeed he has added more names, for which many thanks.
 
Navigator: Temporary Acting Sub-Lieutenant [Temp. Act. Lieutenant 01.04.1945] A.F. (Alan Frederick) Weeks, RNR
 
Gunnery Officer: Temporary Lieutenant [10.10.1942] C.J. (Clifford John) Gwinnell, RNVR
 
Signals Officer: Temporary Lieutenant [01.08.1943] R.M. (Robert McCowan) McMullan, RNVR
 
Please note that in "What do we know about HMS Rushen Castle's first crew?" Lt McMullan's name has been spelt incorrectly as McMullen
 
Asdic Officer: Temporary Acting Sub-Lieutenant [Temp. Lt. 01.01.1945] R.H. (Reginald Howard) Billany, RNVR
 
Unspecified Deck Officer: Rhodes is not mentioned under Rushen Castle, but will undoubtedly be: Temporary Sub-Lieutenant [13.04.1944] C.V. (Cecil Vernon) Rhodes, SANF(V)
 
Medical Officer: Temporary Surgeon Lieutenant [25.02.1944] N. (Norman) Harris, MRCS, LRCP, RNVR
 
Engineer Officer: In the course of time several Engineer Sub-Lieutenants served aboard: C.C. Eggleston, M. Reynolds, R. Forman, L. Collins ...
 
(Added 9 April) Since providing me with the above information, Hans Houterman has gone on to find yet more officers associated with the ship and has now posted an Officers List on his website.