How to prepare and anticipate the grounding of your boat?

This beach in the south of the island of St Martin aux Scilly is ideal for beaching in calm weather.
This beach in the south of the island of St Martin aux Scilly is ideal for beaching in calm weather. © Guillaume Ponçon

Whether you have a full dinghy, a catamaran, a twin keel or crutches, beaching is a pleasure. However, it is important to anticipate the maneuver to guarantee its success.

A night on the beach is very attractive. But you have to do it right. Here are some tips to do it safely.

To be checked before the boat is grounded

The choice of the beaching area and the timing are essential. Our zone must be ideally flat, with preferably a sandy or even a not too soft mud bottom, protected from waves and swell. The latter must absolutely be avoided, because with the swell, the boat could hit the bottom with all its weight at the critical moment of the grounding or the desiccation.

Échouer dans un espace très ouvert comme celui-ci (à Cape Cod aux USA) nécessite d'avoir une météo très calme.
Grounding in a very open space like this requires very calm weather.

It is also necessary to look at the tide and its coefficient. The amplitude must be sufficient for a complete grounding. The ideal is to foresee a good amplitude and to run aground at about mid-tide, in order to limit the critical period of the grounding and the desiccation.

Une zone plane et protégée avec un marnage important est idéale pour échouer.
A flat, protected area with a large tidal range is ideal for beaching.

If at high tide the depth is shallow, it is absolutely necessary to make sure that you will be able to refloat. This will be the case if the coefficient increases. If not, you must take a sufficient margin so that at the next high tide, you can free the boat.

Dans cette zone d'échouage à l'Aber-Wrac'h, nous avions peu d'eau à marée haute. Dans ce cas particulier, le déséchouage doit être minutieusement étudié, préparé puis exécuté.
In this beaching area at Aber-Wrac'h, we had little water at high tide. The desiccation must be carefully studied, prepared and executed in this case.

The immobilization operations will be facilitated if the water is clear and the surface is calm enough to see the bottom and its possible obstacles, such as an isolated rock.

Une eau claire facilite beaucoup l'appréciation des fonds.
Clear water makes it much easier to appreciate the bottom.

Finally, tidal range usually involves current. In general, the latter is our friend, because it helps to immobilize the boat, and smoothes the surface of the water. But it can also dig into the sand or mud. It should be anticipated that it can reverse between grounding and desludging.

Le courant, en particulier dans les rivières, peut creuser la vase, il est important de sonder les fonds et d'immobiliser le bateau avant échouage.
The current, especially in rivers, can dig up the silt. It is important to sound the bottom and to immobilize the boat before beaching.
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