Ponnani, a busy seaport for local craft, lies on the S side of the entrance to the Ponnani River. The port is closed during the Southwest Monsoon, and is in charge of a Port Conservator responsible to the Port Officer at Calicut (Kozhikode).
The extensive backwater of the Ponnani River forms a wide gap in the line of palms when viewed from WSW.
The entrance of the river is wooded and prominent from the S.
Ponnani Light is shown from a white, round, concrete tower with black bands, 0.8 mile S of the river entrance. The bar of the Ponnani River has a depth of not more than 2.1m, but small vessels with local knowledge can enter it at HW. There are some unlicensed pilots available.
Storm signals are shown at Ponnani; the Brief System is used.
The town of Chetwai lies about 1.5 miles within the entrance to a backwater. The existence of the boundary pillars N and S of the backwater entrance is doubtful. Chetwai Light is shown from a 30m high circular concrete tower, lying 1.5 miles N of the boundary pillar.
Anchorage can be taken by small vessels, in 11m, mud, off the entrance to the backwater; local knowledge is necessary.