Yachting Monthly

CALCULATING A POSITION LINE

ext, based on GHA and declination, together with our rough dead reckoning position and the observed sextant height, we will work out not our exact position, but a position line along which we are. In order to fix our position, we’ll take another sight later during the day in order to get another position line, which, together with details about the direction and distance we have moved between

You’re reading a preview, subscribe to read more.

More from Yachting Monthly

Yachting Monthly1 min read
Lassoing
I’m a reluctant lassoer, but sometimes it’s the only way to temporarily secure to a buoy until you’ve got a line attached. The problem in Polperro is that with 75ft between the buoys, you need a very long line to lasso one of them and pay out enough
Yachting Monthly4 min read
Your Cruising Community
The first Ullapool Lugger Festival was held in May to celebrate the great herring fleet of sailing fishing boats that once frequented the Scottish port during the 19th and early 20th centuries, and the renewed interest in these gaff-rigged workboats.
Yachting Monthly1 min read
Technical Purchasing Power
What does lifting a sodden MOB out of the drink and tensioning the backstay have in common? Well, unless you’re sailing a very small dinghy, they both make use of mechanical advantage to multiply the force of the human arm. Also known as purchase, th

Related