shoal

Off the entrance is a high rocky islet, the Nobby, within which the channel is shoal and dangerous to pass.

The continuation of the shoal between the islands and Point Lookout was not clearly ascertained.

At a short quarter of a mile from the point is a rocky shoal of small size, between which and the shore there is deep water.

Some shoal marks on the water were observed opposite these islands, but their existence was not ascertained.

At the bottom of Knocker's Bay is a shoal mangrove opening, of no importance.