July 2024 PM TCN

Q.1) A container vessel dropped Pilot at Cork Harbour Pilot station (51O 45’N, 008O 15’W) at 1000 hrs,
plan a passage to joint East bound Traffic Lane (TSS) off Tuskar Rocks, taking into account tidal stream
data at ‘H’, ship’s speed 16 kts, HW at KOBH 0600 (Spring tide), ship’s draft 12m, all navigational
equipments are in working condition. Courses, way points, distances etc to be plotted on chart and
same to be written in the answer script.

Plan the Passage As per the Question

Q.2) A vessel steering 242° (G) at 12 kts sees Williamstown Lt (51°56.6’N, 007° 50.5’W) AS FLR between 1924 and 2012 hrs. At 2200 hrs ‘Cork racon’ (51° 42.9’N, 008° 14.5’W) was abeam 8.6 miles off. At 2200 hrs she altered course to 180°(G) and engine speed reduced to 9 kts. Find the position of the vessel at 1924 hrs and her estimated position of the vessel at 2300 hrs. Current remained same throughout GE:3°(L).

Answer:

Gyro Course – 242°G / Gyro Error – 3°L / True Course – 245°T
2200 Hrs CTS – 180°G / Gyro Error – 3°L / True Course – 183°T
Ratio: 4:9

1924 Hrs Posn: 510 50.8’N: 0070 37.9’W
2300 Hrs Posn: 510 25.1’N: 0080 05.2’W

Q.3) At 0400 hrs Ballyna courty Lt. Ho. (52O 04.7’N, 007O 33’W) bore 314O(T), Radar distance 5 NM. Vessel then sailed on a certain course at a speed 10 kts with current setting 000O(T) at 3 kts, southerly wind causing a Lee way of 5O. At 0500 hrs Vessel altered course to 112O (T) to pass Connin beg Lt. vessel (52O 02.5’N, 006O 39’W) bearing 356O(T), distance 5 NM.
Find i) Course steered from 0400 hrs to 0500 hrs
ii) Time when Connin beg Lt. Vsl will be abeam on her Port side. Current, wind and E, Spd remained same throughout.

Answer:

i) Course Steered From 0400 hrs to 0500 hrs – 139°T
ii) Dist from 0500 hrs to Conin beg Lt Vsl Abeam point 20.5 Nm
Time Taken – 2 hrs 08 min
Time – 0708 hrs Conin beg Lt. vsl will be abeam on Port side