Because their navy won't risk going into unswept water so it'll reduce their active range, plus if they do its possible they'll hit a mine.

So the mines are not so easily detected….?

mines go boom, mine sweeper go boom first, more mines and russia boats go boom later

@ArbitraryValue Strategically? I don't know. But they're doing us Romanians a great service by destroying a source for all the mines being swept to our shores, lol.

@LaFinlandia