Cruising Tips - Visibility

Signal Advantage (March 2006)If you have an on-the-water emergency during the day, keep in mind that a mirror is a very effective signaling device. If the weather is clear and there is sunlight, the reflection from a mirror can be seen up to 100 miles away. While it does need sun, a mirror doesn’t depend on batteries, satellites, or the electronic watchkeeping of a potential
Author:
Publish date:
Updated on

Signal Advantage (March 2006)

If you have an on-the-water emergency during the day, keep in mind that a mirror is a very effective signaling device. If the weather is clear and there is sunlight, the reflection from a mirror can be seen up to 100 miles away. While it does need sun, a mirror doesn’t depend on batteries, satellites, or the electronic watchkeeping of a potential rescuer. Reflecting sunlight into the eyes of a person on another boat or a plane should get his attention. You could heliograph an SOS code, but simply keeping the beam on your target should quickly lead the person at the other end to conclude that the flash he is seeing is not a chance occurrence.

Specialized signal mirrors come with aiming devices, but any handheld mirror will work if you do the following: Hold two fingers in a “V” at arm’s length with your target inside it. Now hold the mirror against your cheek just below eye level and adjust the mirror angle so the reflected sunlight shines over your fingers. Turn the mirror so the sunlight plays back and forth across your fingers, and it will also move across the target inside the “V”. Keep at least two signaling mirrors on board. Put one in your ditch bag and the other on a shelf near the companionway. Don Casey

To Flash or Not (February 2006)

Flashing white lights are far more noticeable than fixed ones and can be much brighter for the same average power drain. However, it’s dangerous and illegal to show anything that could be confused with a navigation aid, so flashing lights of any color mustn’t be used anywhere in coastal waters. The situation on the high seas, where there are no navigation aids, is not as well defined. The International Rules state that the use of flashing lights for drawing attention to a vessel should be “avoided.” But if a vessel also carries the required lights, and if the flashing light does not interfere with them being seen or with the watchkeeper’s vision, their use isn’t actually prohibited. Unofficially, slow-flashing white strobes are used for various eye-catching purposes—on scientific and fishing drift buoys, for example. Masthead strobes are more likely to be noticed than ordinary navigation lights, and at a much greater range, so it’s understandable that singlehanders sometimes use them on the high seas, in addition to the regulation lights. Aussie Bray

Click here to return to the Cruising Tips Archive

Related

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell. Got a tip? Send it to sailmail@sailmagazine.com The double range  Every skipper knows about ranging two objects in line to keep the boat on track in a cross-current. What’s less obvious is monitoring both sides of a gap such as a harbor entrance. ...read more

FamilyCruise

Bareboating on Puget Sound

Depending on where you are, Puget Sound can look no bigger than a mountainous version of the Intracoastal Waterway. That’s what I thought when I first laid eyes on it from the lighthouse at Mukilteo Park on a sunny day last July. Then I went to the top of the iconic Space Needle ...read more

Bali4point1

Boat Review: Bali 4.1

Coming fast on the heels of its predecessor, the Bali 4.0, the Bali 4.1 adds a number of improvements, many of them inspired by feedback from owners and charterers. She’s an evolution of a concept that has already proven popular and very many benefits from its builder’s ...read more

Headsail

Ask Sail: Silencing A Rattling Headsail

Q: Our Pearson 26 has a 110-percent jib that tends to rattle very noisily at the top hank. We only bought the old boat recently, but it must have been happening for a long time, since there’s a deep groove worn inside that bronze hank. The jib has an unusually large and wide ...read more

Alerion2048x

Alerion Yachts 33, the 90 Minute Get Away

Easy to sail, luxurious, and swift; the Alerion 33 is the solution to your busy life. The intuitive, simple rig design, easy set-up, and put-away mean there’s no need to wait for crew to enjoy a weekend, a day, or an hour out sailing. Her beauty and comfort are evident in the ...read more

anchor

Know how: Ground Tackle

Your ground tackle is like a relationship—the more you care for it, the longer it will last. So, how do you enhance the relationship? First up, think of the accommodations—a damp, salt-rich, often warm environment, just the kind of thing to encourage corrosion. What can be done? ...read more

DSC_7522

Boat Review: Beneteau Oceanis 46.1

The Beneteau sailboat line has long represented a kind of continuum, both in terms of the many models the company is offering at any given moment and over time. This does not, however, in any way diminish the quality of its individual boats. Just the opposite. Case in point: the ...read more