Which european country would probably have the largest navy: switzerland, czech republic, united kingdom, austria? why?

United Kingdom

Explanation:

It's obviously United Kingdom.

Take a look at the map of Europe and locate the other countries. None of Switzerland, Czech Republic nor Austria has access to the ocean.

A navy is a branch of the army that operates on the water.  If you don't have access to the ocean, you have no need for a navy because you don't need to defend yourself on the water because your enemies can't attack you this way.

the proximity of water was an advantage to western europe and its culture was able to flourish as a result. trade and travel by sea were easier and safer in historical times.

1. there are no mountains to protect it from the sea

2. and its has wet cool summers and wet, mild winters.