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