Tidal streams 

Harbour. Tidal streams within the port of Bombay set, with rates of 3/4 to 3 kn, as follows.
East side of the harbour, in-going stream:
The stream sets NE abreast Karanja Island, setting more ENE after passing Karanja Beacon. Between Butcher Island and Elephanta Island the stream sets N, but towards Trombay Island it becomes NE.
West side of the harbour, in-going stream:
The stream sets NNE, from Sunk Rock to Cross Island with a rate of 2 kn; N of Tucker Beacon (18º 56'.l N, 72º 52'.5 E), where the stream separates, a branch of it turns N until abreast Mazagaon Dockyard; then the stream sets between NE and ENE to join the stream from the E side of the harbour N of Butcher Island.
East side of the harbour, out-going stream: 
The stream starts later here than on the W side of the harbour.
The stream sets SW, from the channel between Butcher Island and Elephanta Island, along the NW coast of Karanja Island; when abreast the entrance to Dharamtar Creek it sets WSW. 
West side, of the harbour, out-going stream:
The stream at ordinary tides starts 30 to 35 minutes earlier than on the E side of the harbour; during strong spring tides the stream on the W side may start 
40 minutes to 1 hour earlier. Inshore and near Indira Dock Wall, during the SW monsoon, the stream starts about 45 minutes before high water Bombay.
The stream sets SW from Trombay Island to Mazagaon Dockyard.
The stream sets SSW, from abreast Cross Island to W of Middle Ground Islet; in the middle of the harbour the set is S to SSW.
The set is between S and SSW, from Middle Ground Islet to Sunk Rock, but with the start of this stream the set off Sunk Rock is more W-going.



Fishing Stakes

Mariners are cautioned that Fishing Stakes and gear are liable to be met within depths of less than 20 metres covered by this chart, except for the duration of the SW Monsoon.


OIL AND GAS PIPELINES
Oil and gas pipelines contains flammable material under high pressure. Any ship damaging a pipeline could face an immediate fire hazard. Mariners are strongly advised not to anchor or trawl in the vicinity of pipelines.

OMISSION OF CERTAIN NAVIGATIONAL AIDS AND WRECKS
Certain lights and wrecks have been omitted from this chart; for details of these, the larger scale charts and List of Lights should be consulted.

CURRENTS
The currents are of monsoonal origin, but tend to follow the trend of the coast.In December and January sets are north-westerly with rates of upto 1 knot.In July and August, when the SW Monsoon is well established, south easterly sets with rates of upto 2 knots are experienced.
Exceptionally on-shore sets of upto 1,5 knots are experienced during the NE Monsoon and upto 3 knots during the NE Monsoon and upto 3 knots during the SW Monsoon. For further information see also Sailing Directions, Admiralty Current Atlases etc.
