A high-power air whistle according to IMO for vessels from 75m till 200m in length.

• Air-driven (Power source)
• 130Hz  (Fundamental frequency)

AT 150/165 air whistle, suitable for vessels with a LOA 75m till 200m.

Regulations Before and After COLREG 1972

Before “COLREG 1972” (International Regulations for Preventing Collisions at Sea), low-pitched tones were often used for smaller vessels. However, the principle of reserving low tones for large vessels was not strictly enforced. The IMO regulations now reserve very low tones exclusively for the largest ships. For middle-sized and smaller vessels, there are broader frequency options available.

AT 150/165

Signal Preferences and Frequency Range

IMO regulations prioritize signals that maintain audibility even at a distance. Vessels between 75 and 200 meters (246 – 656 feet) should use whistles with frequencies ranging between 130 and 350 Hz. These frequencies ensure effective communication and compliance with maritime safety standards.

Installation Instructions for AT 150/165

Mounting the AT 150/165

Secure the AT 150/165 whistle with four M10 bolts to an outrigger or similar construction. Ensure the structure is stable to prevent any operational issues.

Cleaning the Supply Pipe
Before connecting the supply pipe to the whistle, blow the pipe thoroughly clean. This step is crucial to avoid any functional troubles caused by debris or contaminants in the pipe.

Installing a Primary Filter
If the pipeline above deck exceeds 100 meters (328 feet), install a primary FILTER TP 15/2 at the base of the mast. This filter protects the whistle from water condensate and rust particles, ensuring reliable operation.

Maintaining the Filter
Regular maintenance is essential for optimal performance. Drain the filter approximately once a month to prevent blockages and maintain the integrity of the signaling system.

Valve Unit Specifications

The VALVE UNIT TV 784 is designed for efficient air flow, featuring thermostatic heating, exchangeable choke flanges, and filters. It includes two coils for normal and emergency operation, as well as a lanyard, providing reliable functionality (see separate leaflet KSM 264 for more details)

Technical Data

• Frequency: 165 Hz
• Sound Pressure Level (1m):
  Total: 148 dB
  1/3 octave IMO limit: 138 dB
• Air consumption: 25 – 35 I/s
• Air supply pressure with choke regulation:
  0,6 – 3 MPa (6 – 30 bar)
• Electric power:
  Thermostat heating: 24 W
  Valve: 8-15 W
• Weight: 14 kg
• For wiring diagram: see Valve Unit TV 784

A high–power whistle according to IMO for vessels of 75 – 200 m (246 – 656’) in length.

• Air-driven (Power source)
• 200Hz  (Fundamental frequency)

A high–power whistle according to IMO for vessels from 75m till 200m in length

• Air-driven (Power source)
• 330Hz  (Fundamental frequency)

A high–power whistle according to IMO for Inland Vessels

• Air-driven (Power source)
• 330Hz  (Fundamental frequency)

Clear and well–sounding tones are obtained by the choice of heavy
bronze for the bell and gong pieces. Other vital parts are of stainless
steel.

Electronic Bell and Gong for use aboard vessels at anchor in restricted visibility

The Bell and Gong sound emitters are identical and electro¬dynamic. They are, also, small and compact compared with many other loudspeaker designs. The design is advantageous from different aspects — not only the aesthetic.

• Sound modules are made of ABS plastic with UV inhibitors.
• Made for roof or wall mounting via stainless steel U-bracket.

A high–power electric whistle according to IMO for vessels up to 75m in length.

• Electronically driven (Power source)
• 350Hz  (Fundamental frequency)

Clear and well–sounding tones are obtained by the choice of heavy
bronze for the bell and gong pieces. Other vital parts are of stainless
steel.

A high–power whistle according to IMO for vessels at sea up to 20m in length.

Approved air horn for each lenght European inland navigation vessels.

• Air-driven (Power source)
• 400Hz  (Fundamental frequency)

A high-power air whistle according to IMO for vessels of 200m or more in length.

• Air-driven (Power source)
• 110Hz  (Fundamental frequency)

A high-power air whistle according to IMO for vessels of 200m or more in length.

• Air-driven (Power source)
• 90Hz  (Fundamental frequency)

A high–power whistle according to IMO for vessels up to 75m in length.

• Air-driven (Power source)
• 260Hz  (Fundamental frequency)

A high–power whistle according to IMO for vessels up to 75m in length.

• Air-driven (Power source)
• 350Hz  (Fundamental frequency)

A high–power whistle according to IMO for vessels up to 75m in length.

Approved for each lenght European inland navigation vessels.

• Air-driven (Power source)
• 440Hz  (Fundamental frequency)