You have to see the
legal requirements two ways:
1) towards the
boat,
2) towards the crew.
The boat needs a
registration paper.
The crew need passports.
Now, depending on where you go, you may need the visa or not. Now, depending on where you go, you may have to pre-advise the local authorities, or not. Same
rule applies to
insurance papers.
In most cases, you enter the country, contact the marina master or harbour master and they tell you where to go first, then the officials will sort of push you along.
You may be able to know most (but at times not all) the info by:
- reading the countries´relevant websites,
- reading recent
cruising guides,
- reading info on e.g. noonsite, (under ´formalities´),
- searching/asking on the Cruising Forum, other
forums,
- talking to other sailors going the same way.
b.