Section 46(34) in The Port Rules for the Port of Bombay
(34)Signals to the Docks by Vessels Entering Dock by day. - Vessels going direct into dock on arrival should, in addition to hoisting the vessel's name hoist as soon as possible a signal denoting the vessel's draft of water at the foremast; this signal to remain hoisted until the Pilot receives an order by signal or other means that the vessel will not dock that tide. Hauling the signal down is an intimation to the Dock Master that the vessel will not dock that tide. The draft is to be expressed by hoisting the Pilot flag over the numeral pennants of the International Code correspnding to the number representing the vessel's draft e.g.Pilot's flag over numeral pennat Nos. 1, 2=12' draftPilot's flag over numeral pennat No. 1, 2,6=12'6" draft.
