GPS For Boats - On Deck Page 2

Get your chartplotter working around the clockAll chartplotters have an anchor alarm that can be set to sound when the boat moves outside a specific radius around a GPS position. The concept is great, but in the real world it is often not all that helpful. The reason is that the anchor alarm's radius is normally set on the boat's position rather than the position of
Author:
Publish date:
Updated on
saip_0909_01_z+gps_for_boats+chartplotter

To do this I first determine the location of the waypoint and then enable the proximity alarm and set its radius; your chartplotter manual will tell you how to do this. If your boat crosses the boundary the alarm will go off. For example, if I establish a waypoint 660 feet downwind and set the proximity alarm at 605 feet, I am creating a boundary just 50 feet behind the boat. If the anchor drags and the boat crosses the line, the alarm will go off. This gives me absolute control over the situation and, more importantly, I always know exactly where I am. To set multiple safety perimeters and box in the boat, all I have to do is establish more waypoints.

If the chartplotter's alarm is not loud enough to wake you, you can connect the chartplotter signal to a loud buzzer, siren, or alarm bell.

Obviously, this method relies on electronic equipment to guard your flank. If there is strong wind or other unusual circumstances, you should always think about setting a formal anchor watch.

saip_0909_04_z+gps_for_boats+jeff_stander

But even when someone is standing an anchor watch, the plotter's safety perimeter and tracking display can still be very helpful because it can confirm that your anchor is holding and it will let you know promptly if you start to drag.

Computer-based navigation software with a boundary-zone function is often even easier to use when you want to establish a safety perimeter. All you have to do is draw the boundary with your mouse and then establish the alarm conditions. But the PC's alarm may not be loud enough to wake you, so this is another case where you should consider connecting the computer alarm to external speakers.

Related

20190614_131026

Kiwi Spirit Takes Line Honors in Bermuda

Mark Riley’s Farr 63 Kiwi Spirit secured line honors yesterday in the Marion to Bermuda race, finishing off St. David’s Lighthouse at 0227 local time. Francis Seldorff’s Kinship, a Baltic 52, was second in the 40-boat fleet, crossing the line at around 0500. With 18-year-old ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell. Got a tip? Send it to sailmail@sailmagazine.com No cracked skulls please Modern boats with aft bathing ladders offer a big advantage when it comes to rescuing crew who have fallen overboard. Not all casualties are basket cases unable to help ...read more

01-Lead-show

France’s Annual Multihull Show

If a boat show could be described as intimate, the annual Salon International du Multicoque in La Grande Motte, on France’s Mediterranean coast, is it. Held in the latter part of April, the multihulls-only in-water show is a boon for builders, because the people who attend come ...read more

Furlex-Electric

Gear: Seldén’s Furlex Electric

Furl Power Seldén’s Furlex Electric offers an easy path into the world of sweat-free headsail furling. The compact unit can be retrofitted to an existing manual Furlex unit or installed as a replacement for whatever you’ve got now. Its DC-DC converter accepts your boat’s 12V or ...read more

11_DSC8423Tom-Zydler

Cruising: Nova Scotia

There’s a unique cruising ground that combines access to urban locations with easy escapes to wilderness and nature. Its native people may be the friendliest on the east coast of North America. Its coastline runs 250 nautical miles in a straight line, but that should be ...read more

01-LEAD-shutterstock_727849660

Boat Monitoring System

Boat Oversight In a world where you can track your friends’ locations in real time and stream yourself live on the internet, it should come as no surprise that you can also keep a close eye on your boat from the comfort of home. In fact, not only is there a plethora of options ...read more