Vertical Datum: LAT Quality of Depth: ES The IRENE was mine din 1915. She sunk 1.5m ESE from Tongue Light Vessel. 01-NOV-1946 Located by sonar. Oropesa sweep - clear at 45, foul at 48ft, least echosounder depth 54ft. 07-NOV-1946 Amend least depth to 44ft - datum error. 15-MAR-1962 Drift sweep - clear at 50, foul at 52ft, least echosounder depth 54 in general depth 59ft. Scour depth 76ft. 25-JAN-1967 Least echosounder depth 55 in general depth 59ft. Scour depth 73ft. 30-JUL-1969 Least echosounder depth 16 in general depth 16.5 To 17m. Scour depth 21.3m. Fixed in position 51 29 43N 001 27 11E. 04-JUN-1974 Examined in 51 29 42N 001 27 12E, least echosounder depth 15.7 in 18m. Scour depth 22.7m. 23-NOV-1983 In 51 29 42N 001 27 12E, least echosounder depth 15.5 in general depth 18m. Scour depth 4m, side scan sonar height not obtained. Lying NNW/SSE. 01-NOV-1989 In 51 29 42N 001 27 13E. Swept clear at 15.5, Foul at 15.7m, least echosounder depth 15.2 in general depth 18m. Scour depth 23.6m, side scan sonar height 2.8m. Lies 145/325 degrees. Large magnetometer deflection.

<1> Hydrographic Office wreck index, Extracted 20-JAN-1993, Page Nos. N/a (Bibliographic reference). SKE6339.