Exercise 4 Test Answers

Q.1. 

Long West,   LHA = GHA – LONG

GHA   = 150o 15’.4

LONG =  30o 38’.3W     (-)

LHA   =  119o 37’.1

Q.2.

Long East, LHA = GHA + LONG

GHA    =  45o  23’.4

LONG  =  70o  54’.5E    (+)

LHA    = 116o   17’.9

Q.3.

Long East, LHA = GHA + LONG (-360o ?)

GHA   = 345o  15’.00

LONG =   65o  19’.67E.  (+)

LHA   =  410o 34’.67

360o 00’.00    (-)

50o 34’.67 

Q.4.

Long West, LHA = GHA – LONG (+360o ?)

GHA   =      15o  30’.0

LONG =   –172o 25’.8W.  (-)

LHA    =  -156o  55’.8

+360o  00’.0      (+)

           203o   04’.2

 Click here to return to exercise 4

 A fuller explanation of this topic is given in the book ‘Astro Navigation Demystified’.

Useful Link: Local Hour Angle and Greenwich Angle Hour

Return to the blog:  www.astronavigationdemystified.com

 

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