Blocking straits with navies

[Stark]

As AS I wanted to block KH from going to Asia Minor, so I positioned my fleets to block Bosphorus and Dardanelles, but next turn several KH armies were in Asia Minor. They have only one settlement nearby so it's impossible they were built there. Do ships block straits? I'm not sure how probable is that they transfered all those armies with ships.

Before that I wanted to block Macedonians on that island to the west of Asia Minor (Miles or similar), so I positioned one fleet on the only place where my diplomat could pass to that island. The next turn, two full armies of theirs were besieging my city.

[Brennus]

From my experience fleets do block straights, or at least they kept the Romans out of Sicily for me for ages. Be warned that the Dardanelles has two possible crossing points.

[Arjos]

I think that some straits crossing were made obliquely, so it's not possible to block them all...

[Cute Wolf]

meh, a depleted panda (or hoplitai hopless) unit in a fort will do the same result, with obviously bigger blocking range

[Taedius]

Yes, I don't think fleets can block landbridges, only the access of other fleets. Am I wrong?

[Stark]

Yes, I don't think fleets can block landbridges, only the access of other fleets. Am I wrong?

That would be a shame. And completely unrealistic.

meh, a depleted panda (or hoplitai hopless) unit in a fort will do the same result, with obviously bigger blocking range

Could enemy besiege that fort? If not that would be a great way to block straits. If it can, than there is no point, I still have to defend it all the time. A navy can free me from countless battles on that front.

Besides, as Koinon Hellenoion controls both sides of Bosphorus, I only want to deny them reinforcements (atleast until I counquer that city), not stop them from invading me. Currently I can do that by navy only.