J/Boats J/88, Руководство пользователя

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J88 OWNER MANUAL 50
Appendix
APPENDIX A
Best Practices – Boat Inspection
J Boats has compiled, with the help of several industry experts, the following “best practices” inspection,
maintenance and use guide for J/Boat owners. We urge each owner to read carefully the recommendations,
to proactively and periodically inspect all critical components of your boat, and to contact anyone in the
J/Boats network of dealers, builders and class associations if you need any assistance.
INSPECTION OVERVIEW
Considering the typical high-frequency use seen by many J/Boats, at a minimum, we recommend that owners
have their boats inspected on an annual basis and that a professional survey be done every five years. An
inspection should include a detailed review of the high-load areas, such as the rudder and keel attachments,
rigging terminals, structural bulkheads, keel floors, mast step, mast partners, steering systems, mast and
boom fittings, lifelines, etc. Inspection should also include identifying any possible leaks, including thru-hull
fittings, as well as identifying worn rigging and hardware. Additional inspections/surveys should be performed
immediately after any instances of grounding, collision, and/or extreme weather sailing.
The American Bureau of Shipping (A.B.S.) calls for a detailed inspection every two years and a professional
survey every 6 years (see Appendix B for details) following new construction.
According to Carter Gowrie of the Gowrie Group, most insurance companies mandate a professional survey
for boats at 10 years. A survey may indicate a structural or safety issue that an owner needs to address in
order to continue insurance coverage. For boats that haven’t changed hands (which usually triggers a pre-
sale survey), it’s otherwise left entirely to the owner to determine when a survey should occur.
KEEL/ KEEL FLOORS
Overview - One of the most critical areas of a modern, fin-keeled composite boat is the keel and keel floor
area. This is an area that absorbs incredible loads and enormous stress.
Use Considerations:
1) Groundings - after any grounding or collision with any underwater object, soft or hard, be sure to
carefully inspect the keel, sump area and keel floors for any signs of cracking or weakness. This is
best handled by a qualified marine surveyor. Even a seemingly minor grounding can weaken the
overall structure, particularly if left un-repaired for any length of time and/or if the boat continues to
sail without repairing. There have been cases where a moderate grounding revealed no visible
damage (due to the bottom of the boat absorbing the impact and then returning to shape), only later
to reveal the presence of fractured glass on the inner hull laminate just aft of the keel. Have repairs
done by a professional yard with a follow-up survey.
2) Trailering/ hauling/ poppets - boats that are actively trailered can be subject to excessive stress
and strain on the keel/hull joint. In fact, years of trailering alone can subject a keel/ hull joint to
excessively sharp vertical accelerations that can cause significant wear and tear on any portion of the
composite structure; including keel sump and keel floors.
According to Triad Trailers, one should first load a trailer by placing most of the weight (80-90%) on
the keel as it sits in the trailer’s keel tray. Then screw each individual hull support up to the hull just