How To Buy a Cruising Boat Chapter 22 of 49

Impact Resistance—Two Collision Scenarios



When a keel this deep, with this small a bearing surface, is mated to a high-tech cored hull and the boat then hits something hard, the results are not pretty. You can see the scope of the repair by the discoloured area in the top photo. A repair that cost over a hundred thousand dollars because the entire structural grid was separated from the hull and much of the interior cabinetry had to be removed to reattach it.

In Part 1 we looked at the impact resistance of several common boat building materials. Now, in this post, we will examine what happens in a grounding or collision and what proper design can do to ameliorate the damage.

To continue reading login (scroll down) or:

Learn About Membership


CLICK HERE to get to know us for free.

Meet the Author


Matt, Engineering Correspondent, is a Professional Engineer and true renaissance man, with a wide range of expertise including photography and all things boat design. He has a unique ability to make complex subjects easy to understand and he keeps an eye on the rest of us to make sure that we don’t make any technical mistakes. Working as M. B. Marsh Marine Design, Matt designs innovative powerboats of all shapes and sizes.

Notify of
Inline Feedbacks
View all comments
This is a guest