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The globe needs WebGL, which this browser has switched off. Every survey is still listed alongside.
Every marine survey with a navigational warning in force, read each day from the official Notices to Mariners and drawn where the notice says it is. Every entry links back to its notice.
Every survey vessel at work has to tell mariners where it is and how much sea room it needs. Those notices are public. Wide Berth reads the official Notices to Mariners twice a day and draws each survey where its notice puts it.
Not a vessel tracker and not for navigation. A notice says where work is permitted, not where the ship is this minute. Regions that publish only nationally are not covered yet. Always use the official broadcast at sea.
Because the notices are. The judgement on top — what a spread like that means for your programme — is what Standard Wavelength is for.