EXERCISE 1– PLANE AND PARALLEL SAILING (Numerical Solution)

IN THE FOLLOWING CASES, FIND THE SET AND DRIFT OF CURRENT:

	DR		FIX
	LATITUDE	LONGITUDE		LATITUDE	LONGITUDE
11.	46˚ 44.3’ N	076˚  36.3’ E		47˚ 00.6’ N	076˚  10.4’ E
12.	30˚ 16.8’ S	057˚  49.3’ E		31˚ 00.7’ S	058˚  20.4’ E
13.	00˚ 11.6’ N	179˚  50.2’ W		00˚ 40.3’ S	178˚  40.1’ E
14.	60˚ 20.6’ S	076˚  18.4’ W		60˚ 01.7’ S	175˚  54.9’ W
15.	50˚ 16.3’ N	000˚  12.3’ E		49˚ 50.4’ N	000˚  20.1 W

SOLUTIONS :

11. FROM : LAT 46˚ 44.3’ N           LONG    076˚  3’ E

    TO: LAT  47˚ 00.6’ N           LONG  076˚  10.4’ E

D’LAT   00˚ 16.3’ N        D’LONG     000˚ 25.9’ W

D’LAT   00˚ 16.3’ N        D’LONG     000˚ 25.9’ W   and    M’LAT    46˚ 52.4’ N

We know that:

DEP. =( D’LONG × Cos M’LAT)
= (25.9 × Cos 46˚ 52.4’)
= 017.70

Tan Co. = (DEP./D’LAT)
=(017.70/16.3)
COURSE = N 47˚ 21.5’ W

DISTANCE = (D’LAT × Sec Co.)
= (16.3 × Sec 47˚ 21.5’)
DISTANCE = 24.0 M