Seniority was an 2,876 GRT cargo ship which was built in 1942 as Empire Boswell for the Ministry of War Transport (MoWT).

Postwar she was sold into merchant service as Aviswell and Seniority, serving until she ran aground on 7 November 1950.

She was initially operated under the management of Currie Line Ltd.[3] She was a member of a number of convoys during the Second World War.

[5] Convoy UGS 18 departed from the Hampton Roads, United States on 15 September 1943 and arrived at Port Said on 13 October.

She was operated under the management of Purvis Shipping Co Ltd.[1] In 1949, Aviswell was sold to F T Everard & Co Ltd and renamed Seniority.