Dec 2020 TCN
Q.1) At 0530 hrs, a vessel was in position with Lundy Island South bearing 030°(T) and 6’ off. She
steered a certain compass course and her engine speed was 9 Knots. After one hour she altered her
course to due north and increased her engine speed to 12 knots. At 0700 hrs, the bearing of Lundy
Island North was observed to 120°(T). The current in the area was setting 330°(T) at 3.5 kts. Find her
position at 0700 hrs and initial course steered by the vessel.
Answer:
0700 Hrs position: 51°19.4’N; 005° 00.6’W
Initial Course – 299° T
Q.2) At 1500 hrs on a vessel steering 080O(T), Porteymon Point (43) (51° 31.5’ N, 004° 13’ W) bore
030°(T). At 1530 hrs it was due north and at 1600 hrs it bore 330°(T). Determine course and speed
made good and the rate of current if the current was setting south.
Answer:
CMG – 090°T
SMG – 11.9 Kts
Rate – 2.15 Kts
Q.3) A vessel observes the following compass bearings:
Scarweather Lt. v/l (51° 27’N, 003° 56’ W) – 296°(C)
Porthcawal point Lt. House (51° 28’N, 003° 42’W) – 006°(C)
Nash Point Lt. House (51° 24’N, 003° 33’W) – 092°(C)
Find the ship’s position. From this position lay courses to reach Swansea Pilot Point if the ship’s draft is 12 meters.
Answer:
HSA Btw Scarweather Lt. v/l & Porthcawal Point Lt. House – 070° / Complementary Angle – 020°
HSA btw Porthcawal Point Lt. House & Nash Point lt. House – 086° / Complementary Angle – 004°
Vessel Position: 51°26.5’N; 003°42.0’W & Plan the passage