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NOTE! The trailer's centre of gravity must be to-
ward the front. Make sure that the boat is securely
attached to the trailer. A swaying boat may strike a
single support point, damaging the hull. IMPOR-
TANT: The trailer's keel supports should carry most
of the weight of the boat.
5.2 Using your boat for towing
When towing another boat, a buoyant rope of suf-
ficient strength should be used. Start the tow care-
fully and avoid jerking movements. Do not overload
the engine. When towing a rowing boat, remem-
ber that it is designed for slow speeds only. It is not
suitable for fast towing, as it will not plane.
6 Technical specifications
Terhi boats have consecutive serial numbers, a
CIN (Craft Identification Number) code etched
into the right side of the stern under the fender
list. You will need this number when you insure,
register or sell the boat. Referring to this serial
number helps with the delivery of correct spare
parts and accessories. Check that the serial num-
ber on the warranty certificate corresponds to that
on the boat. Fill in the boat and motor details in
the boxes below for future reference.
6.1 General set-up, dimensions and capaci-
ties, design categories
Boat model:
Boat serial number (CIN code):
Engine model:
Engine serial number:
Design categories:
Terhi - Owner's manual
WARNING! The towing rope is highly tensioned
when towing. If it breaks, the end of the rope can
reach dangerously high speeds. Always use a thick
enough rope, and avoid being in the vicinity of
the end of the rope.
5.3 Launching & Recovery
When launching and recovering your Terhi boat on
to its trailer ensure that the boat is empty of wa-
ter and luggage. Winch it carefully on to the trailer
avoiding excessive strain on the bow eye. Make
sure the trailers rollers and supports do not hit the
angled scupper plate that covers the drain hole as
the boat is winched on. Always release the tension
on the winch strap once the bow is resting on the
rubber bump stop. Never winch your boat on to
the trailer with people in the boat.
Category C This boat is designed for use in con-
ditions, in which the wind speed does not exceed
6 on the Beaufort scale (approx. 14 m/s) and the
swell is in proportion to that (significant wave
height does not exceed 2m, see note below).
Such conditions can be found in open lakes, river
estuaries and coastal waters in moderate weather
conditions.
Category D: This boat is designed for use in
conditions, in which the wind speed does not
exceed 4 on the Beaufort scale (approx. 8 m/s)
and the swell is in proportion to that (meaning a
wave height of max. 0.3 m, with occasional waves
reaching a height of 0.5m). Such conditions can
be found in sheltered inland waters and coastal
waters in good weather conditions.
Significant wave height is the average height
(trough to crest) of the highest 33% of waves over
an indicated 12 hour period, which roughly corre-
sponds to the height estimated by an experienced
observer. Some individual waves can be twice as
high as this.
12
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