SailNet Community - View Single Post - GPS Anchor Alarms
View Single Post
post #7 of Old 09-26-2001 Thread Starter
Join Date: Jun 2001
Posts: 51
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 16
GPS Anchor Alarms

I agree that the GPS display resolution has nothing to do with the accuracy of an anchor drag alarm.

I thought we had digressed to discussing the value of WAAS accuracy for everyday navigation tasks. For general pilotage, I maintain that a marginal improvement in accuracy isn''t useful unless the granularity of the display will represent it.

In practice, my obsolete non-WAAS, non-DGPS anchor alarm doesn''t fire at night when I set it to .02 nautical miles, (120 feet).

It does go off every time we drive the boat away from the drop point after we pull up the hook--I always forget to turn it off--and it goes off when the boat swings, so I know it works.

If the alarm did go off spuriously, I''d just set it to 180 feet.
EscapeArtist is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome