Example: Your ships 0700 DR position on 24 January 1981 is LAT 22-25.0N
LONG 46-10.0W. Your vessel is on course 110 T at a speed of 12.0 knots. Your job
is to determine zone time of LAN.
STEP 1: DATE 24 JAN 1981
STEP 2: MER. PASS. 1212
STEP 3: DR LONG 45-11.5W
STEP 4: STD MERIDIAN 45-00.0W
STEP 5: d (arc) 0-11.5
STEP 6: d long. time + 0m 46s
STEP 7: ZT LAN ( 1st Est. ) 12h 12m 46s = 1213
