Sailboat
In restricted visibility, a power-driven vessel under way is required to sound one prolonged blast followed by two short blasts every two minutes. This signal helps to indicate the vessel's presence to other nearby vessels in low visibility conditions. The prolonged blast lasts for about four to six seconds, while the short blasts are approximately one second each.
One prolonged blast followed two short blasts, every two minutes, not to exceed two minutes. Rule 35-Sound Signals in restricted visibility.
One prolonged followed by one short is NOT a signal defined by International Regulations for Preventing Collisions at Sea, 1972 (72COLREGS). Unless you are are leaving a dock or berth (one prolonged) then immediately arranging a port to port passage. Unless that is the case there is no such thing as 1 prolonged followed by 1 short.
Rules of the Road.Rule 35InternationalSound Signals in Restricted visibility.(c) A vessel not under command, a vessel restricted in her ability to maneuver, a vessel constrained by her draft, a sailing vessel, a vessel engaged in fishing, and a vessel engaged in towing or pushing another vessel shall, instead of the signals prescribed in paragraphs (a) or (b) of this rule, sound at intervals of not more than two minutes three blast in succession, namely one prolonged followed by two short blast.
Rules of the RoadRule 35Sound Signals in Restricted Visibility(C) A vessel not under command, a vessel restricted in her ability to maneuver, a vessel constrained by her draft, a sailing vessel, a vessel engaged in fishing, and a vessel engaged in towing or pushing another vessel shall..........sound at intervals of not more than two minutes, three blast in succession, namely one prolonged followed by two short blasts.
None, since there are no symbols and so nothing which can be "immediately followed by symbol".None, since there are no symbols and so nothing which can be "immediately followed by symbol".None, since there are no symbols and so nothing which can be "immediately followed by symbol".None, since there are no symbols and so nothing which can be "immediately followed by symbol".
Rule 35 part c of the International Regulations for Preventing Collisions at Sea (72 COLREGS) states that when in restricted visibility (i.e. fog) a sailing vessel is required to sound one prolonged blast followed by two short blasts on the vessel's whistle, at intervals of not more than two minutes. Please refer to the link below.
In reduced visibility, a power-driven vessel underway is required to sound one prolonged blast followed by two short blasts every two minutes. This signal indicates its presence to other vessels in the area. The prolonged blast lasts about four to six seconds, while the short blasts last about one second each. This signaling helps to prevent collisions in situations where visibility is limited.
Three short blasts means you are operating in reverse. One prolonged blast followed by 3 short blasts means boat under tow in redcued visibility conditions.
One prolonged followed by one short is NOT a signal defined by International Regulations for Preventing Collisions at Sea, 1972 (72COLREGS). Unless you are are leaving a dock or berth (one prolonged) then immediately arranging a port to port passage. Unless that is the case there is no such thing as 1 prolonged followed by 1 short.
The weather was fine, we wished we could prolong our holiday
Rules of the Road. Rule 35, Sound Signals in Restricted Visibility. (C) A vessel not under command, a vessel restricted in her ability to maneuver, a vessel constrained by her draft, a sailing vessel, a vessel engaged in fishing, and a vessel engaged in towing or pushing another vessel SHALL, sound at intervals of not more than two minutes three blast in succession, namely one prolonged followed by two short blast.