HOW DID SAILORS
NAVIGATE
?
BEFORE GPS
Trouble Plottin Your Locati
?
ng ion
Plotting Yo
Throw Over Bow
Count Number of knots
Record sp in knots
Your Speed
peed
Time for 30 seconds
Setting Up Sextant
Set to 0 Degrees
Shades On!
Finding
Squeeze clamp to release index bar
Line the sun up with the horizon
Latitude
r
Use the micrometer to adjust the position of the sun. So that it sits perfectly on the horizon.
Establishin
Look at the seconds This is yo
ng Reading
QUICKLY! -
s first, then minutes, make a record of it. our first steps to finding your Longitude!
Finding L
- 4hrs
- 3hrs
- 2hrs
- 1hr
L T (G
when it is noon loca therefore, your position l To find out your exact position
Longitude
Local Time GMT)
If the chronometer says 2pm, al time, you know you are 2 hours behind, lies on the on the corresponding meridian. n the seconds and minutes hands are used.
Longitude
Latitude
Plotting Longitude & Lattitude
Use the cordinates you have calculated in the previous steps to plot your exact location.
Produced By
Nathan Drury & Natalie Faunch