Category:

FS02 NAi

SeaMark Fog Signal

  • 2 nautical mile (NM) range
  • Directional sound output
  • Levelling sensor, water ingress detection and compression driver monitoring
  • Sound level control for test mode
  • Standard NAi bus interface for power supply and communication
  • Bluetooth interface for commissioning & testing

The SeaMark fog signal is a compact and lightweight device consisting of 2 units. The modular design allows for easier installation as each unit can be mounted onto a standard railing independently, removing the need for a mechanical lifting aid. Each unit produces a 0.5 NM sound output and when combined produces a 2 NM range. The sound output is limited to ±50° (-6dB) in the horizontal plane to reduce energy consumption and eliminate interference caused by reflected sound waves from the structure on which it is mounted.

The fog signal satisfies IALA recommendation O-139A and E-109B. The fog signal is activated and deactivated on demand by a visibility meter connected to the NAi bus. An integrated GNSS (GPS primary, GLONASS secondary) unit ensures synchronised blast patterns independently from the network. A levelling sensor assures accurate installation whilst compression driver monitoring allows for detailed monitoring and optimised maintenance.

The NAi bus supplies power, sets the blast code and transmits status and error messages to the central NAi controller with a SCADA interface. Each device can be connected to Bluetooth for rapid commissioning, testing and diagnostics.

The integrated 96 hours battery backup (optional) makes use of Nickel Metal Hydride batteries with a lifetime of at least 15 years and eliminates the need for a centralised UPS. A smart charger allows for predictive battery maintenance further reducing the overall cost of ownership of the device.

 

Technical Data
DIMENSIONS & WEIGHT
Parameter - No UPS
Dimensions of each unit
(width x height x depth)
350 mm x 500 mm x 205 mm
Dimensions of 2NM unit
(width x height x depth)
451 mm x 1150 mm x 549 mm
Diameter of junction box124 mm
Weight of each unit including battery
(if applicable)
16.1 kg
Weight of 2 NM device including brackets, junction box and acoustic diaphragm, including battery (if applicable)48.7 kg
Parameter - Standard UPS
Dimensions of each unit
(width x height x depth)
350 mm x 500 mm x 205 mm
Dimensions of 2NM unit
(width x height x depth)
451 mm x 1150 mm x 549 mm
Diameter of junction box124 mm
Weight of each unit including battery
(if applicable)
20 kg
Weight of 2 NM device including brackets, junction box and acoustic diaphragm, including battery (if applicable)56.5 kg
SIGNAL SPECIFICATION
Signal output134 dB @ 1 m
Output frequency850 Hz
Nominal range2 NM
Signal output horizontal angle± 35 ° (-3 dB); ± 50 ° (-6 dB);
ENVIRONMENTAL CONDITIONS
RegulationsIEC 60945, device type ‘exposed’
IEC 61892-1:2019
Environmental temperature-25 °C to +55 °C
Ambient temperature (storage / transport)-40 °C to +70 °C
Humidity
(operation / storage / transport)
95 % r.h. up to 45 °C
70 % r.h. for T > 45 °C
Atmospheric pressure
(operation / storage / transport)
80 kPa to 108 kPa
Degree of protection (acc. To IEC 60529)IP66
ELECTRICAL SAFETY
RegulationsEN 62368-1:2014/AC:2015
EN 62133-1:2017
Protection classClass II
MECHANICAL REQUIREMENTS
RegulationsEN 60945:2002, Category “Exposed”
RELIABILITY
IALA Category1D (assumed MTTR of 96 h)
MATERIAL
HousingPolyethylene (colour: RAL1023)
Front plate and rear wallStainless steel 316 L / 1.4404