MSI Maritime Safety Information
In the Uk MCA is responsible for the provision of Maritime Safety Information (MSI) to vessels at sea, The MSI Information is broadcast every 6 hours, it may be interrupted or delayed due to search and rescue.
The UK Met Office on behalf of the MCA, provides two official marine forecast for MSI: Shipping Forecast and Inshore Water Forecast.
MSI Is broadcast:
- by NAVTEX (navigational telex) out to 270 miles
- on VHF out to 30 miles
- on MF out to 150 Miles
The MSI broadcast includes:
- Information on wind strength and direction
- Update on sea conditions
- Warnings of restricted visibility
- Navigational guidance and warnings