MAYDAY, MAYDAY, MAYDAY.

This is SCHEEPSNAAM, SCHEEPSNAAM, SCHEEPSNAAM.

Call sign: CALLSIGN
MMSI: MMSI-NUMMER

MAYDAY.
This is SCHEEPSNAAM, call sign CALLSIGN, MMSI MMSI-NUMMER.

My position is:
Latitude: … degrees … point … minutes North.
Longitude: … degrees … point … minutes East. (Or bearing and distance from a charted object)

We are: …
(State nature of distress: sinking, fire, man overboard, etc.)

I REQUIRE IMMEDIATE ASSISTANCE.

The vessel is a … metre colour motor or sailing pleasure craft.

We have … persons on board.

OVER.