This depends on where you are located in the world as every country will have its own marine authority which handles MMSI numbers.
The important thing to know is that once you have an MMSI number, it will make your LifeLine fully functional anywhere in the world. There is no need to change this number if you are travelling.
Please follow this link for more detailed information about MMSI numbers: http://nautiluslifeline.com/support_mmsi
Normally, you will have no need to change your MMSI number. However, if, for example, you make a mistake when entering the number, it can be changed. 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, LifeLine serial number and place of purchase to firstname.lastname@example.org and we will reset your MMSI. All you have to do after that is to connect your LifeLine to the Desktop Software and you will receive a prompt telling you that your MMSI number has been cleared. If this does not appear right away, click the Updates tab, then the Software Settings tab, and then "Check for Software Update".
With your LifeLine connected to the Desktop Software, click the Apps tab, then Customize Settings. You will see a field on the right side of the screen where the number can be entered. Enter your MMSI number and click "Apply MMSI Number to LifeLine".
After you have taken your LifeLine out and acquired a few GPS points (up to 32 points will be saved) you can then come back, connect your LifeLine to the Desktop Software, and click this button. This will open up a map displaying the locations where you have been with the LifeLine.
This may indicate one of two things: either your LifeLine is low on charge, or the LifeLine requires firmware installation. Both are easily resolved; instructions detailed below.
1. If your LifeLine is very low on charge, it is possible that nothing will display on the screen until it is connected to power for up to 20 mins. At this point, we suggest that you leave the LifeLine connected until the Green light is extinguished.
Important: Disregard the indicated charge percentage for the first connection of your LifeLine. Your LifeLine is not fully charged until the green light has extinguished.
2. If the LifeLine is connected to a power source and the screen does not turn on, this is an indication that the firmware has been erased on your LifeLine and needs to be repaired by doing the following:
Updating the firmware on a LifeLine using a Mac computer requires the use of a bootable Live CD.
It is not possible to use Virtualization technologies such as Parallels, VMWare, or Virtualbox to connect to a LifeLine or update the firmware.
NOTE: If the computer is running on wireless internet from the Live CD the Software Update check and Registration by internet will fail. These can be completed when you are NOT using the Live CD with the Mac desktop software on any wifi or wired connection.
Sometimes your computer may not recognize the LifeLine when you first plug it in. Please try the following:
In order to get a GPS lock on your LifeLine, please ensure the following:
Allow a moment for the LifeLine to acquire satellites in view – the number of satellites is represented at the top right hand corner of the screen. Once the LifeLine has a GPS lock, the numbers will change to a |+|. At this point, your GPS location will be represented on your LifeLine screen, accurate to within 5 meters.
To change the channel of the Green Button on your LifeLine, there are two simple options. Before trying either of these options, ensure that your dive region selected on the "General" tab on the LifeLine desktop software is appropriate to your next dive location.
From the General tab, changing the Chat channel will update the LifeLine automatically, however, the new channel will not be activated until the LifeLine is disconnected from the computer.
Alternatively, you can change your channels on the fly without using a computer by following the steps below:
Note: You do NOT need to change your MMSI number when travelling.
This can happen depending on the specific security settings if you are using Internet Explorer, usually IE6. This typically happens when the file download is incomplete. We recommend that you try downloading the Desktop Software using an updated version of Internet Explorer or by using another browser such as Firefox or Google Chrome.
Changing the battery on your LifeLine is something that must be done by the manufacturer. In order to change the battery on your LifeLine, you can send the LifeLine to us by mail and for a fee of $59.99 we will examine the LifeLine and install a new battery.
Attempting to change the battery on your own will void the warranty. Please do not attempt to do so.