An Admiralty tug, hired for examination service on December 6, 1939, sunk when she detonated a magnetic mine probably dropped from a German aircraft. Year Built: 1914 Boilers: 1 Propulsion: Screw, 3 cylinder triple expansion Owner: Royal Navy Date of Loss Qualifier: A Additional sources cited in United Kingdom Shipwreck Index: MOD(N).Hyd.Wk.No.012304438

Vertical Datum: LAT Quality of Depth: SWD The NAPIA was hired for examination service and was mined in 1939. 29-JUN-1959 Dispersed to within 1ft of the seabed. 17-OCT-1987 Examined in 51 15 41.0N, 001 25 11.0E. Least echosounder depth 5.5 in general depth 6.2m. Scour depth 7.1m. Side scan sonar height 0.5m. Apparently dispersed over area 45 x 30m with no particular orientation. Magnetic anomaly indicates iron content of some 50 tonnes.(2)

<1> United Kingdom shipwreck index, Page Nos. N/a (Bibliographic reference). SKE6340.

<2> Hydrographic Office wreck index (Bibliographic reference). SKE6339.