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

There is good anchorage in four, five, or six fathoms, about half a mile outside of the bar, on a bank of sand, which gradually deepens for three miles to fourteen fathoms, upon any part of which a vessel may anchor to await high water.
Latitude of its entrance 31 degrees 25 minutes 32 seconds South.
Longitude 152 degrees 57 minutes 25 seconds East.
Variation of the compass 10 degrees 11 minutes 0 seconds East.
High water at full and change 8 hours 56 minutes.
Tide rises four to five feet.
The south-east trend of SMOKY CAPE is in latitude 30 degrees 55 minutes 40 seconds, longitude 153 degrees 4 minutes 30 seconds.
TRIAL BAY, so named by Lieutenant Oxley, who anchored in it on a second expedition to examine Port Macquarie previous to its being settled, is a convenient roadstead during southerly winds: it is situated on the north side of Smoky Cape, and affords an anchorage in three fathoms, protected from the sea as far as North-East by East.

Fresh water may be procured from a stream that runs over the beach.

Four miles to the north of Smoky Cape is an inlet having a bar harbour, on which there is but eight feet water.
SHOAL BAY is the next harbour to the northward: the following description of it is from Captain Flinders (Flinders' Terra Australis, Introduction, cxcv.) "On the south side of the entrance, which is the deepest, there is ten feet at low water; and within side the depth is from two to four fathoms, in a channel near the south shore: the rest of the bar is mostly occupied by shoals, over which boats can scarcely pass when the tide is out.

High water appeared to take place about seven hours after the moon's passage; at which time a ship not drawing more than fourteen feet might venture in, if severely pressed.