EXERCISE 1– PLANE AND PARALLEL SAILING (Numerical Solution)

9. FROM : LAT 36˚ 11.7’ N           LONG    075˚  6’ E

   TO: LAT 40˚ 18.6’ N      LONG 080˚  11.5’ E

D’LAT   04˚ 06.9’ N        D’LONG    004˚ 58.9’ E

D’LAT   04˚ 06.9’ N        D’LONG     004˚ 58.9’ E   and    M’LAT    38˚ 15.1’ N

We know that:

DEP. =( D’LONG × Cos M’LAT)
= (298.9 × Cos 38˚ 15.1’)
= 234.7 E

Tan Co. = (DEP. / D’LAT)
= (234.7/246.9)
COURSE = N 43˚ 32.9’ E

DISTANCE =( D’LAT × Sec Co.)
= (246.9 × Sec 43˚ 32.9’
DISTANCE = 340.6 M

10. FROM : LAT 60˚ 11.6’ N           LONG    076˚  3’ W

    TO : LAT 55˚ 10.3’ N      LONG 080˚  16.8 W

D’LAT   05˚ 01.3’ S        D’LONG    003˚  32.5’ W

D’LAT   05˚ 01.3’ S        D’LONG     003˚ 32.5’ W   and    M’LAT  57˚ 40.9’ N

We know that:

DEP. = (D’LONG × Cos M’LAT)
= (212.5 × Cos 57˚ 40.9’)
=  113.6 W

Tan Co. = (DEP./D’LAT)
= (113.6/301.3)
COURSE = S 20˚ 39.5’ W

DISTANCE = (D’LAT × Sec Co.)
= (301.3 × Sec 20˚ 39.5’)
DISTANCE = 322 M