Ask Sail: Wilting waypoints

"Starting my engine often wipes out some waypoints in my charting program. My multimeter tells me that the voltage to the charting system drops only .5 volt when the starter is cranking, but that seems to be enough to cause the problem. Everything else still works fine with the lower voltage. Any ideas?"-- Janet Margelli, Marina del Rey, CaliforniaGordon West
Author:
Updated:
Original:

"Starting my engine often wipes out some waypoints in my charting program. My multimeter tells me that the voltage to the charting system drops only .5 volt when the starter is cranking, but that seems to be enough to cause the problem. Everything else still works fine with the lower voltage. Any ideas?"

-- Janet Margelli, Marina del Rey, California

Gordon West replies: The problem is not the voltage, but rather spikes from the starter motor that creep into your charting system’s microprocessor and cause some of the circuits to momentarily stumble. If you could see the voltage feeding into your charting system with an oscilloscope, you’d see a forest of pulses when you press the starter button. What you need is a buffer battery that will keep these starter-motor spikes from reaching the electronics. Newmar’s Start Guard, for example, switches electronics to an internal battery system whenever the engine is cranking and, once the engine is running, recharges the buffer battery. It’s available at most marine electronics stores, or you can click on communication products/installation accessories at www.newmarpower.com.

Related

01-LEAD-lagoon46-ncz4503-a3

10 Places to Cruise With a Catamaran

Navel gazing doesn’t get much better than from the deck of a sailboat anchored somewhere exotic. You can think great thoughts staring up at the stars from a South Seas anchorage. It’s also better doing so on a catamaran. Full confession: I’m a cat convert, a cat evangelist if ...read more

Radome

Ask SAIL: Some Random TLC

Q: I recently removed my radar’s white radome, which covers the internal rotating antenna. I gave the radome a light sandblasting to clear it of years of grime and discoloring. Should I paint it, too? — B. Anderson, Aberdeen, MD GORDON WEST REPLIES Stop! First, make sure the ...read more

L42-Sea-Trails-3728

Boat Review: Leopard 42

Sticking with its proven design formula, but also cherry-picking popular features from its recent models, Leopard Catamarans has launched a “best of” package with this new boat that sold nearly 30 units before hull #1 even touched water. Like a greatest hits album, the Leopard ...read more

01-LEAD-Cut8

Know how: Reinforcing Engine Stringers

If I were to ask, “What are the top five parts of the engine you want to be able to easily access?” How would you respond? Would it be the dipstick? The overflow coolant? I’d wager the raw water pump and its impeller would also make the list. Am I right? The reason we want to be ...read more

Sail-VOE-4-a

Experience: Under the Eyes of the Bar Bunch

Sitting quietly at the bar of a local yacht club, I gaze out over a rambunctious Lake Michigan on a sunny but blustery spring afternoon. I am enjoying watching a small sloop approaching the marina and recognize it as belonging to one of our newest members. “Pretty little thing. ...read more

01-LEAD-Bocas_Marina2

Cruising: Hurricane Heaven

As I write this, another hurricane season has passed. In hundreds of harbors and marinas, sailors are breathing a sigh of relief. I know the feeling since I rode out eight spinners aboard my sturdy 30-footer. I can recall the precise moment when I said, “No more!” It was in ...read more

J45-Podcast-vert-600x-02

Point of SAIL: J/Boats Inc. President Jeff Johnstone

In this episode of Point of SAIL, sponsored by West System Epoxy, Principal Editor Adam Cort talks with Jeff Johnstone, president of J/Boats Inc., the company that has brought the world such iconic designs as the J/24, the J/105 and the J/22, to name a few. In their ...read more

100719BTSC-9304

Boat Review: Catalina 545

Catalina has long been the largest All-American family cruiser company, building what sailors might call “standard” boats. Moving up from the popular 30ft to 45ft sizes puts the company into “yacht” territory, and the new Catalina 545, winner of the SAIL magazine 2020 Best Boats ...read more