Apr 2023 AM TCN

Q.1) At 1100 hours a vessel observes ‘Svartgrund’ buoy (55° 14.2’ N, 014° 15.2’E) 3 miles to NE with her engines under repairs. At 1300 hours the engines were started at a slow speed of 6 knots. Set course now to have ‘Hammerode’ Lt. Ho. (55° 17.9’ N, 014° 46.6’E) right ahead when 4 miles away. When will this light house will be at right ahead? Current in this area is known to set north at 3 knots.

Answer:

Drift= (Distance Off x Rate)/ (Engine Speed) = (4×3)/6=2′
SMG= (AB × Rate)/Drift= (3.6×3)/2=5.4 Kts

CTS – 116°T
Time – 1604 hrs Hammerode Lt will be right ahead

Q.2) A vessel anchored off Ystad observes the followings bearings:
Abbekas Lt. (56° 23’N, 013° 37’E) 298°(C)
Ystad South Lt. (55° 25’N, 013° 49’E) 009°(C)
Kasebarga Lt. (55° 23’N, 014° 04’E) 078°(C)
Find the position of the ship and compass error if it was the same for all three observations. From this position, find the compass course to steer to pass Hammerodde light (55° 18’N, 014° 47’E) at a distance of 2 miles, countering a current setting 060°(T) x 2 knots and a strong N’ly wind causing a
leeway of 5°.

Answer:

HSA Btw Abbekas Lt. & Ystad South Lt. – 071° / Complementary Angle – 019°
HSA Btw Ystad South Lt. & Kasebarga Lt. – 069° / Complementary Angle – 021°

Vessel Position: 55°20.5’N; 013°48.5’E
Compass Error – 3.5°W
CMG – 091°(T)
Course to Steer – 098° T (Without Counteracting leeway)
Course to Steer – 093° T (Counteracting leeway)
Compass Course to Steer – 096.5° C

Q.3) Your ship, maximum speed 16 knots, a large tanker in ballast, max draft 11m, is equipped with state of the art bridge equipment in good working order, is scheduled to reach off ‘Falsterbo’ Racon (55° 18.5’N, 012° 39.6’E), after dropping her pilot in position 56° 07.8’ N, 014° 53.0’E on completion
of the dry docking.
Make a passage plan if visibility is moderate & southerly gales with rains is the prevailing weather.

Plan the Passage as per question