MSLD 505
Man OverBoard Positioning Device
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Maritime Emergency Rescue – Man Overboard (MOB) Positioning Device
The life-saving rescue device is equipment that maritime personnel should wear at all times. When a person falls overboard, the MLSD 505 device is activated in an emergency and can automatically or manually transmit AIS distress signals, VHF DSC alarms, and voice distress calls.
The device features automatic GPS positioning and transmits the distress location—longitude and latitude—to rescue vessels and aircraft equipped with AIS (Automatic Identification System) and VHF DSC (Very High Frequency Digital Selective Calling) systems. This enables rescuers to locate the person in distress in the shortest possible time.
VHF equipment will also receive digital (DSC) alarm signals and voice distress calls, significantly improving rescue efficiency.
Safety Protection for Maritime and Offshore Personnel
The alarm positioning beacon has an effective rescue range of approximately 3 to 5 nautical miles. When a person falls into the water, the device activates automatically, which is particularly useful in situations where the person is unconscious or injured and unable to manually operate the device.
It provides essential safety protection for maritime professionals. Please carry and wear the device correctly at all times.
Product Specifications
Product Specifications
Operating Frequencies:
161.975 MHz (AIS Channel 1 Alarm)
162.025 MHz (AIS Channel 2 Alarm)
156.525 MHz (VHF Channel 70 Alarm)
156.800 MHz (VHF Channel 16 Voice Distress Call in Chinese & English)
Effective Luminous Intensity: ≥ 0.75 cd
Light Duration: ≥ 8 hours
Alarm Duration: ≥ 72 hours
Flash Rate: 50–70 flashes per minute
Radiated Power: ≤ 1 W
Battery Type: Lithium battery
Battery Service Life: 4 years
Operating Temperature Range: -25°C to +55°C
Compass Safe Distance: 650 mm
Waterproof Rating: IP67
Dimensions: 120 × 58 × 34 mm
Weight: ≤ 200 g
Precautions:
This device is for emergency use only.
Repeated testing will shorten battery life.
Avoid obstructing the GPS antenna.
Compliance Standards
SOLAS (International Convention for the Safety of Life at Sea)
MSC.48(66) as amended by MSC.207(81)
MSC.81(70) as amended by MSC.200(80)
MSC.226(82) and MSC.323(89)
JT/T 1223-2018
GD32-2023
ITU-R M.493-15
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