Apr 2025 AM TCN

Q.1) A vessel steering 255°(T) at 12 knots, observes Olands Sudra Grund Lt. (56° 04’N, 016° 41’E) bearing 005°(T) at 2000 hrs and 040°(T) and 2100 hrs. At 2215 hrs Utklippan Lt. (55° 57’N, 015° 42’E) bore 355° (T). If the hrs current during the above period was setting 239°(T). Find:
i) Position of ship at 2000 hrs, 2100 hrs and 2215
ii) CMG and SMG and
iii) Rate of current.

Answer:

2000 Hrs Posn: 55°51’N; 016°38.8’E
2100 Hrs Posn: 55°46.7’N; 016°14.6’E
2215 Hrs Posn: 55°41.6’N; 015°44.5’E
CMG – 252°T; SMG – 14.3 Kts
Rate – 2.3 Kts

Q.2) At 1000 hrs while steering 300°(T), the vessel observed Sandhemaran Lt. Ho. (55°23.5’N,
014°11.5’E) bearing 30° on her starboard bow and at 1025 hrs abeam. From this position, find
compass course to steer to pass Kullagrund Lt. Ho. (55° 18’N, 013° 20’E) 5 miles off to starboard counteracting a current estimated to set South at 3 knots and leeway of 3° caused by southerly wind.

Answer:

1000 hrs – 30° Stbd bow – 300+30=330°T
1025 hrs – Abeam – 300+90=030°T
Engine Speed for 25 mins = 5 kts

CTS – 268°T
Leeway Track – 265°T
Variation – 2°W
Deviation Card No 3 from CL Dubey book taken
Compass heading Deviation Magnetic Heading
270 5W 265
280 5.5W 274.5
By Interpolation Deviation For Mag heading – 5.1W
Compass CTS – 272.1° (C)

Q.3) A 2200 hrs vessel dropped pilot at Simrishamn pilot station (55O 34’ N, 014O 24’E). She intends to join the West bound lane of TSS off falseterbore Racon (55O 18.5’N, 012O39.5’E). Plot safe course on chart with draft 10 m and UKC of 2.0m throughout, GPS not working, gale force winds expected during the passage. Plan your passage giving details of what equipment and landmarks you would use.

Plan the Passage as per the question