Jane Blythe (The Sea Devils)

Third Officer Jane Blythe was a Royal Navy officer who served as Captain John Hart's secretary at HMS Seaspite.

She often served food and wrote down notes for Captain Hart. She later informed Captain Hart that the Doctor was seen out at sea, chasing after another boat. (TV: The Sea Devils)

Behind the scenes
In the novelisation, she is the W.R.N. Writer instead of Third Officer.