Chart No. 1 · K 46.1
Fish haven (artificial reef)
Dangers
A dashed limit labeled 'Fish Haven' encloses an artificial reef — obstructions with uncertain clearance.
What it means
A dashed limit with the legend 'Fish Haven' encloses an artificial reef built to attract fish — sunken rubble, concrete, or hulks. A figure such as '(auth min 12 ft)' gives the authorized minimum depth over it.
Why it matters
The 'authorized' depth is a permit condition, not a survey — material may stand higher. Avoid anchoring or passing closely over fish havens in shallow water.