A boatswain's call, pipe, or bosun's whistle is a pipe or a non-diaphragm type whistle used on naval ships by a boatswain. The pipe consists of a narrow tube (the gun) which directs air over a metal sphere (the buoy) with a hole in the top.

Jan 2, 2025 · Sound signals are used to communicate between ships, to indicate a vessel’s position, and to warn of potential danger. Knowing what different signals mean and how to respond to them can help prevent accidents and ensure safe navigation.

How do you choose the right horn (ship’s whistle) for your vessel? What are the regulations? Before 1972, selection of a ship's whistle was largely a subjective decision; as was approval by regulatory agencies.

Mar 19, 2017 · It’s actually easy to remember the whistle signals, if you think one blast means port and two blasts means starboard, per the guide below from the 67 th edition of Chapman Piloting and Seamanship, which I helped edit (unabashed plug):

Whistle signals are one of the many means we boaters have to effectively communicate. Whistle signals can keep other boaters informed of what you are doing. More common navigational situations for use of whistle signals are to avoid collisions and …

According to the international regulations all the sea faring ships should compulsorily have a whistle on board. Moreover, the whistle should be in good working condition with clear audibility. The whistle should be designed to provide prolonged blast at appropriate time intervals.

A boatswain's call or bosun's whistle is a pipe shaped whistle that was used aboard naval ships by the boatswain. The boatswain's call was used to pass orders or commands to the ships crew when the voice could not be heard, because of its high pitch the sound of the whistle could be heard above the activities of the crew and the sound of the ...

Before the days of public address (PA) systems aboard ships, every word passed was by word of mouth. The word was given to the Boatswain or BMOW, who sounded “Call mates” to assemble his mates. As they drew near from different parts of …

Feb 28, 2014 · Its distinctive shape has remained practically unchanged from medieval times to the present day. The call’s shrill whistle can be varied in pitch and duration to convey a variety of information, and can be heard above the sound of wind and sea.

INELTEH's ship's whistle range includes electronic sirens type ITES-MS-120, used for vessels less than 20 m in length and air horn type ITAS, used for vessels 20 - 75 m in length. Both types are type approved by CRS. ITES-MS-120 series is specially designed for marine application.