Every
boat over 4.5 meters [14.7 feet] going
Mexico needs to have a
Temporary Boat Import Permit [TIP]; which is good for 10 years [&for multiple entries].
You can go online, to Banjercito, to apply for the
permit [variable fee ±1,200 pesos, or about $55.00 USD]
If you are crossing into Mexico by sea, and going south of Ensenada, you can get a
Mexican tourist permit [FMM], and have it validated at the first port of entry.
If you will be crossing into Mexico by sea, but not going south of Ensenada, and not stopping on land, you will need to obtain a nautical FMM tourist
permit.
FMMs are good for 180 days.
Banjercito TIP ➥ https://www.banjercito.com.mx/registroVehiculos/#
FMM Tourist Permit ➥ https://www.gob.mx/inm/acciones-y-pr...utical-tourism