I have been using both Coastal Defence Company and Beach Defence Company as translations of the unit type. While these are nothing like the original Finnish name for these units (which would be literally translated: Repulse Company), they at least give pretty good idea what the function of the particular unit type was. As mentioned early on these units were formed to provide close defence for coastal fortifications. Later on they were simply heavily armed (main weaponry: medium machineguns and light guns in 20-mm - 47-mm caliber range) companies of coastal troops used to defend important beaches and islands. Usually a whole company was placed in the same island, part of island or part of coast, with each platoon of particular company having base of its own there. Due to nature of their weaponry these bases were usually in the very beaches they were to defend.John Hilly wrote: In fact the Torjuntakomppaniat were Coastal Companies originally trained by the Coast-Artillery as close support troops of the coast fortification.
To be honest, they weren't formed with the men above the average, i.e. they were mostly crapped. Sorry for saying that!
Back to the subject of translating these bloody TK's:
Maybe the translation might be "Coastal defence Company"?
My website has some info about organisations used in TK (called Coastal Defence Company in the page):