Product Details
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Nautilus Lifeline - GPS Radio for Divers
Finally a diver distress deacon and radio in one,
lost at sea or just out for the day this unit covers all bases.
GPS coordinate transmitter with the added bonus of being able to talk to other divers also using the system or talk to the boat or helicopter if you become separated at sea.
Distress Button
Depress button for 3 seconds for DSC transmission of distress message. GPS coordinates will display on the other vessel's marine radios within 8 miles (12.5 km) range. Or activate optional non-emergency group call with GPS coordinates and automatic channel switch for all Lifelines belonging to a specific diveboat or group. 
Strobe Light
We prefer to call this the diver position indicating light. Duel strobes will flash in DISTRESS MODE which is especially usueful after sunset. 
Waterproof Housing
Polycarbonate housing depth rated to 425 feet (130 meters). Tough enough to drive a Ford Explorer over during testing. Do not drive over your own lifeline. 
GPS
Latest version Jupiter 3 GPS receiver displaying latitude and longitude on the LCD display. 
LCD Display
Displays GPS position, signal lock, channel in use, battery remaining as well as volume, squelch, channel selection and GPS polling.
display. 
Boat Button
Press this button to turn radio GPS on to Ch16, the universal hail and distress channel worldwide on EVERY marine radio. Use this button to select alternate channels 09, 14 or other pre-selected channels. Embedded software prevents an inexperienced user from inadvertently locking the channel up. 
Chat Button
Pressing this button will turn the radio GPS on or switch to user selected marine VHF frequency. Use this button to change channels to any marine frequency. This is a fully functional marine VHF radio. Use both buttons together to adjust volume or squelch, select GPS polling or turn radio off. Unit will timeout and turn off automatically after sleeping > 20 minutes. 
Speaker / Microphone
Waterproof to IP67 standards. Submersible to 3 feet (1 meter). The cap of your Lifeline can be opened on the surface (only) in any sea state allowing full use of all features. 
USB Port
Used for recharging the battery, downloading GPS log of dive sites onto Googlemap or interface for adjusting advanced settings. 
Rechargeable Battery
1850 mAh lithium ion battery. Connects to any USB charger. 24 hours of battery life in DISTRESS mode. 
Antenna
VHF whip antenna. Waterproof to IP67 standards. Extend antenna for maximum range. Easy to stow when not in use. Range can be further extended by holding unit above your head in the DISTRESS MODE.
MMSI Registrations & Functionality
In the UK, we are advised that OFCOM will provide an MMSI to an individual Nautilus Lifeline. Please contact them directly.
Below is information as provided by the manufacturer on their website
How do i get an MMSI number Internationally?
Regulations regarding MMSI vary from country to country and we are not able to stay informed on the current regulations in each area. We encourage you to contact your local regulatory body for information on MMSI use in your region.
The UK regulatory body is OFCOM
Is a Boatus.com MMSI ok to use internationally?
A number is needed in order to activate the red button and LocateMe technology. If you are outside of US waters an alert message and GPS position will still be received on all modern radios within 10 - 12 mile range if you depress the red button.
How do i change my MMSI number?
International regulations state that only the radio manufacturer may change an MMSI number. The Lifeline is the only marine radio that allows this change WITHOUT sending it back to the factory. Email your name, unit serial number and place of purchase to info@nautilusexplorer.com and we will reset your MMSI. All you have to do after that is go online and select “update firmware”. Please allow 2 business days.
VHF Radio Licence
A VHF Licence is required to operate any VHF radio and the Nautilus Lifeline is no different.
Information is available from Ofcom https://services.ofcom.org.uk/
or the RYA
http://www.rya.org.uk/coursestraining/courses/specialist/Pages/SRC.aspx
Training courses are available from many centres in many countrys.