Having written my original post I found in the back of a forgotten book a small amount of notes for BOAC first officers of C class aircraft issued in 1944.The document mentions collecting the appropriate map from the Station Manager plus a variety of publications including a route book , duplicate navigational logs and the Corporation’s Secret Handbook, which included codes and cyphers.There is no mention of tide tables. No dedicated navigator was carried and navigation seems to have been a case of following roads, railways and rivers and sometimes getting very lost.
Blind landings at Lindi station are discussed in the linked clip below. The man talking was the Imperial manager of the station.
Blind Landings ? the audio ? White Water Landings