
On the morning of 1^{st} Dec 1992, in DR 47^{0} 16’N 143^{0} 26’E, the sextant altitude of the Polestar was 46^{0}7’ at 08h 51m 15s chron time (error 05m 11s slow). If IE was 2.1’ off the arc and HE was 17m, find the direction of the PL and a position through which it passes.
Solution –

In the evening of 22^{nd} Sept 1992, a ship in DR long 160^{0 }12’W, found the sextant altitude of Polaris to be 36^{0}6’ at 05h 23m 17s chron time (error 02m 09s fast). If IE was 2.8’ on the arc and HE was 10m, find the direction of the PL and the latitude where it cuts the DR longitude.
Solution –

At about 0330 ship’s time on 1^{st} May 1992, in DR longitude 150^{0}E, the observed altitude of Polaris was 50^{0 }8’ bearing 005^{0} (C) at 05h 30m 30s by chron (error nil). HE 14m var 1^{0}E. Find the deviation of the compass, the direction of the PL and a position through which to draw it.
Solution –

On 6^{th} March 1992, at 0200 ship’s time in DR 37’N 00^{0} 00’, the Pole star bore 365^{0} (C). If variation was 3.7^{0}W, find the deviation of the compass.
Solution –

On 13^{th} Sept 1992, PM at ship in DR 37^{0} 26’N 72^{0} 46’E, the Pole star bore 350^{0} (C) at 03h 59m 03s by chron (error 10m 03s slow). If variation was 10^{0}E, find the deviation for the ship’s head.
Solution –
Correction for exercise no. 2. The true az is 000.9 degree (t) not minute.