Chaparral 420 PREMIERE, Owner'S/Operator'S Manual

Page: 60 / 164

Anchoring
Read this section carefully. Proper anchoring
requires understanding the relationship between
rode, scope, and anchor performance.
Rode:
The line connecting the anchor to the boat is
considered a rode. The 420 Premiere has a
rope/chain rode. An all-chain rode is optional.
Scope:
Adequate scope is necessary for your boat to
be anchored safely. Scope is the ratio of the length
of the anchor line to the distance from the bow
chocks to the bottom. To calculate how much rode to
use when anchoring, use the following formula:
Rode Length = (Bow Water Depth) x Scope
Scope = Rode Length
Bow Water Depth
• Scope depends on the type of anchor, bottom,
tide, wind, and sea conditions.
• The minimum is 5:1 for calm conditions; the
norm is 7:1; severe conditions may require 10:1.
Lowering Anchor
• Be sure there is adequate rode.
• Secure the rode to both the anchor and the boat.
• Stop completely before lowering the anchor.
• If using a windlass, refer to the windlass opera-
tor’s manual.
• Keep feet clear of coiled line.
• Be sure to turn on the anchor light at night and
in reduced visibility.
Weighing Anchor
Weighing or pulling in the anchor requires moving
the boat in the direction of the anchor and pulling in
the anchor as the boat moves. For this reason, the
engines should be running.
• Run the boat slowly up to the anchor, taking in
the rode as you go.
• The anchor will usually break out when the rode
becomes vertical.
• Be careful that trailing lines do not foul in the
propeller.
Note: Use the fresh water washdown spigot in
the starboard bow locker to hose down the
chain in the locker after haul-in.
4-6
BOW
HEIGHT
WATER
DEPTH
ANCHOR
RODE
FLOAT
TRIPLINE
RODE
Figure 4.4 Anchoring
ANCHORING
TRIPLINE ARRANGEMENT
CAUTION: The safety hook is supplied to
ensure that the anchor is held in place should
the windlass fail. Do not use the safety hook to
support the anchor in a stored position. The
windlass should always support the anchor and
hold the roller device securely.