Marine GPS beacons provide precise location tracking for vessels at sea. Communication systems enable real-time data transmission between ships and shore. These technologies enhance safety, navigation, and coordination in maritime operations.

Marine GPS Beacons:
- Size: Typically 100-200mm in diameter, 150-300mm in height
- Grade: IPX7 or higher for waterproofing
- Viscosity: N/A
- Buoyancy: Designed to float with buoyancy of 5-10 kg
- Material: High-impact plastic or corrosion-resistant metal
- Frequency: 406 MHz for distress signals
- Battery Life: 5-10 years in standby mode
- Operating Temperature: -30°C to +70°C

Marine Communication Systems:
- Size: Varies (handheld: 150-200mm, fixed: 200-300mm)
- Grade: IPX7/IPX8 for waterproofing
- Viscosity: N/A
- Buoyancy: Handheld models may float
- Material: ABS plastic, stainless steel, or aluminum
- Frequency Range: VHF (156-174 MHz), HF, or satellite
- Power Output: 1-25W (depending on system)
- Operating Temperature: -20°C to +55°C