Boating New Zealand — December 2017

102 Boating New Zealand

T

his isn’t limited to small boats either. When we

recently purchased a 9.5m power cat, we were

astonished at the absence of a VHF radio. The

previous owner said he had “never quite got

around to fitting one,” fortunately an oversight

he never got to regret.

Every boat should have a VHF and, ideally, two different

types so there’s a back-up in case one fails. So, what to buy?

Handheld or fixed install?

HANDHELD

A fixed-mount VHF is relatively easy to install – deciding on a

model is perhaps the most difficult part. But small boats with

limited space may prefer a handheld unit rather than a one

permanently fitted. Handheld units are also a perfect secondary

radio for larger vessels. With models available for just over $100

new, there’s no excuse for not having a handheld on board.

The power output of a handheld VHF is usually between

2.5 watts and about 6 watts. Since a VHF’s range is affected

by the height of the antenna above the water, in most cases

this modest output is more than adequate for a handheld

model. Some models have provision for connecting an external

antenna, which will boost the range.

A more important requirement is to make sure a handheld

device is robust and waterproof, since it might be stored in

a damp locker or doused with water. It is also a good idea to

ensure the unit will float if dropped overboard. The LCD screen

of higher-end models like the GME GX800W will automatically

start flashing brightly if dropped in water, making it easier to

spot and retrieve.

Finally, consider battery life. Some models have lithium-ion

batteries which provide a longer life and hold their charge for

long periods. On the other hand, a case can be made for a unit

with replaceable batteries, especially if a pack of fresh batteries

is always stored with the radio.

Given the price of new handheld units, it probably

doesn’t make sense to buy a second-hand model, since its

waterproofness and/or reliability may be compromised. When

your life depends on it, you really want to know the unit works.

FIXED VHF

For most boats a permanently-installed unit is a better option

as the primary radio rather than a handheld, since these models

are more powerful (typical output is around 25 watts).

The radio won’t be lost in the back of a locker or forgotten

at home and, as long as the boat has at least some charge in the

house battery the radio will have power. Also, since the much

with NORMAN HOLTZHAUSEN

DIYBOATING

Second to lifejackets, a VHF radio is one

of your boat’s most important safety

items. It’s the quickest way of calling for

help – yet a surprising number of vessels

still head out without a working unit.

Fitting a VHF