What is my boats MMSI number?
A MMSI number (Maritime Mobile Service Identity) is a nine-digit number that identifies your boat for marine traffic monitoring systems. The unique identifier facilitates VHF communications, customs and border security, emergency response, and commercial call tracking and billing.
Do I need an MMSI number?
The MMSI # is required for ALL AIS transponders to transmit your identity over the air. If you are a US documented or registered vessel and are required to have MMSI # then you are also required to have an FCC Ship Station License & Restricted Radio Operators Permit.
How do I get an Australian MMSI number?

To obtain an MMSI number, owners & operators of VHF and MF/HF marine radios must hold a Marine Radio Operator’s Certificate of Proficiency. Courses for this qualification are coordinated by the Australian Maritime College, in Tasmania and volunteer invigilator (exam supervisor) around the country.
Can I get an MMSI number without a boat?
U.S. Non-Federal User Mariners not required to carry a marine radio (e.g. recreational boaters) and who remain in U.S. waters can obtain an MMSI through approved organizations such as BOAT US 1-800-563-1536, U.S. Power Squadron, and Shine Micro (primarily for AIS).
Does an MMSI number cost money?
MMSI numbers are free for BoatUS Members or $25 for non-Members.
How do I register for MMSI number?

You can register your FCC issued MMSI number on the BoatUS website by going to the Non-BoatUS MMSI service page. Note: that if you plan to make broadcasts in foreign waters you will need to obtain a new FCC licenses.
How much does a MMSI number cost?
How long does it take to get a MMSI number?
Once you have completed the license application, it takes about 2 days for the FCC to issue the license. Your license will include a call sign and MMSI for your vessel. You can check back here once you have completed the application and search for your license using your FRN, vessel name or your name.
How do I enter MMSI number into VHF radio?
To enter the MMSI number, follow these instructions:
- Power ON the VHF Radio.
- Press the Menu button.
- Select DSC.
- Select My MMSI.
- For each number in the sequence, turn the channel knob clockwise to increase the number, and counter-clockwise to decrease the number.
- Select Accept once the MMSI number has been entered correctly.
Do I need an MMSI number for my boat?
How do I Manage my MMSI number from sea tow?
If you have received a MMSI number from Sea Tow in the past, you can manage it by clicking here or by clicking “Login” in the top righthand side of the website. If you would like to register for a new MMSI number please visit the U.S. Power Squadron MMSI registration site.
What is a maritime mobile service identity number (MMSI)?
MMSI stands for Maritime Mobile Service Identity. This identification number is issued to all new Ship Radio and Ship Portable Radio Licenses. You can get this number if you will first complete a VHF Radio course. This course will show you how to operate the radio of a vessel.
How do I Register my MMSI number with BoatUS?
You can register your FCC issued MMSI number on the BoatUS website by going to the Non-BoatUS MMSI service page. Note: that if you plan to make broadcasts in foreign waters you will need to obtain a new FCC licenses. How can I transfer a FCC assigned MMSI number to a new boat owner and programmed radio?
Do I need an MMSI number for international cruising?
No. You are required to obtain a Ship’s Station License from the FCC and they will provide an MMSI number that is valid for international cruising. To obtain a Ship’s Station License from the FCC, please visit the Ship Radio Stations page or call 877-480-3201.