The Marine GMDSS (Global Maritime Distress and Safety System) equipment includes essential communication systems like VHF, MF/HF radios, and satellite devices. These systems ensure reliable distress alerting, safety messaging, and general communication at sea. GMDSS equipment is mandatory on ships to enhance maritime safety and coordination during emergencies.

Marine GMDSS Equipment and Communication Systems typically include the following key specifications and technical properties:

Size: Varies by device (e.g., handheld VHF radios: ~200x80x50mm, EPIRBs: ~300-400mm in height).

Grade: Compliant with IMO SOLAS, ITU, and IEC standards (e.g., GMDSS Class A, B, or D).

Viscosity: Not applicable to communication systems (relevant for fluids like lubricants).

Buoyancy: EPIRBs and SARTs are buoyant (floats upright in water).

Material: High-impact plastics, corrosion-resistant metals (e.g., aluminum, stainless steel), waterproof enclosures (IPX7/IPX8 rated).

Frequency Range: VHF (156-174 MHz), MF/HF (1.6-30 MHz), Inmarsat (L-band 1.5-1.6 GHz).

Power Supply: 12/24V DC, battery backup (lithium or NiMH).

Operating Temperature: -20°C to +55°C (marine environment rated).

Waterproof Rating: Minimum IPX7 (submersion up to 1m for 30 mins).

Transmission Power: VHF (25W), HF (150W), EPIRB (5W).

GPS Integration: Built-in GNSS for distress alerting (EPIRB, PLB).

Battery Life: EPIRBs (48+ hours), handheld VHF (10+ hours).

Antenna Type: Fixed or flexible (EPIRB/SART), whip antenna (VHF/HF).