EXERCISE 1– PLANE AND PARALLEL SAILING (Numerical Solution)

7. FROM : LAT 03˚ 12.0’ N           LONG    004˚  3’ E

   TO: LAT   02˚ 30.4’ S      LONG  002˚  10.0’ W

D’LAT   05˚ 42.4’ S        D’LONG     006˚ 21.3’ W

D’LAT   05˚ 42.4’ S        D’LONG     006˚ 21.3’ W   and    M’LAT  02˚ 51.2’ N

We know that:

DEP. =( D’LONG × Cos M’LAT)
= (381.3 × Cos 02˚ 51.2’)
= 380.82 W

Tan Co. = (DEP. / D’LAT)
= (380.82/342.4)
COURSE = S 48˚ 02.4’ W

DISTANCE = (D’LAT × Sec Co.)
= (342.4 × Sec 48˚ 02.4’)
DISTANCE = 512.1 M

8. FROM : LAT 56˚ 12.5’ S           LONG    046˚  5’ W

   TO: LAT 50˚ 11.3’ S                   LONG 044˚  14.8’ W

D’LAT   06˚ 01.2’ N        D’LONG   001˚  57.7’ E

D’LAT   06˚ 01.2’ N        D’LONG     001˚ 57.7’ E   and    M’LAT  53˚ 11.9’ S

DEP. = (D’LONG × Cos M’LAT)
= (117.7× Cos 53˚ 11.9’)
= 70.50 W

TAN Co. = (DEP. / D’LAT)
= (70.50 / 361.2)
COURSE = N 11˚ 02.6’ E

DISTANCE = (D’LAT × Sec Co.)
= (361.2 × Sec 11˚ 02.6’
DISTANCE = 368.0 M