Jan 2024 AM TCN
Q.1) A vessel at anchor South of YSTAD observed the following compass bearings: –
Sandhammaren (55° 24’N, 014° 40’E) 067°C
Ystad (South) (55° 25’N, 013° 49’E) 010°C
Abbekas (55° 23’N, 013° 36’E) 320°C
Find the vessel’s position and compass error.
Answer:
HSA Btw Sandhammaren & Ystad (South) -057° / Complementary angle – 33°
HSA Btw Ystad (South) & Abbekas – 050° / Complementary angle – 040°
Vessel Position: 55° 16.8’N; 013° 47’E
Compass Error: 1° W
Q.2) A vessel steering a course of 260°T observed Olands Sodra Grund ltd. (56° 04.3’ N, 016° 41’E)
bearing 010°T at 0400 hours. Again at 0500 hours, the same light bore 040°T. At 0615 hours, Utklippan
Lt. (55° 57’ N, 015° 42’ E) bore 351°T if the current was setting 300°T, find the following:
a) Position of the ship at 0400 hours and 0615 hours
b) Course and speed made good
c) Rate of the current
Answer:
a) 0400 hrs Position: 55°47.5’N; 016°35.5’E
0500 hrs Position: 55°44.2’N; 015°46.2’E
b) CMG – 263°T
SMG – 12.6 kts
c) Rate of Current – 0.7 Kts