I keep a Bayliner on Lough Corrib. There are no restrictions on the lake,
however there are speed limits on the River Corrib - that's from where
the lake joins the river at the Friar's cut down to Galway City.
You must respect the rowers and not create a dangerous wake that
might cause them to capsize. Lough Corrib is navigable from Galway City
to Máam Bridge, marked the red/white and black marks.
Power boats must give way/show courtesy to anglers and yachts.
Bob Wilson (trading as BW Boats/Naas) has a fine range of
Bayliner-type craft.