"Swim-over" site plans
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A "swim-over" site plan is a simple sketch
plan of the features as seen by a diver swimming across or along a
site (or part of a site). It is intended to be a sketched record of
the site's main features and layout, not an accurate "survey" or a
"work of art" so don't worry about your drawing abilities. Those of
you who are interested in subsequently undertaking a more extensive
survey of your site as a club or group project might like to consider
the NAS "Adopt a Wreck"
Scheme.
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An example of a swim-over site plan for a small,
iron-framed wreck in Chesil Cove is shown below. It was made in a single
40 minute dive in less than perfect visibility and although being a far
from complete record, it still manages to show the main structural elements
of the site and how they arranged relative to each other.
If at all possible, your plan should be
referenced to both a compass orientation and a measurement scale (using
whatever you have available to use; true measurements, estimated
measurements, calibrated hand spans, arm spans or fin kick cycles
etc.).
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