Originally Posted by HUMBER P4VWL
So with the right to roam in Scotland, are there any boating/launching/speed restrictions on the Lochs?
The right to roam only applies to unmotorized travel (walking, cycling, horse riding, canoeing etc) there is no right to access with an engine anywhere. Of course in sea lochs there is the same right to navigate you have elsewhere in the UK, and as jambo says mostly unrestricted. There are some places with speed limits.
There aren't that many inland lochs which are big enough for interesting ribbing and easy enough to access. Because there is no right of access the owner can impose whatever restrictions they wish. Loch lomond is obviously big enough to entertain, and has access at reasonable cost but some speed limits. The lochs which form part of the Caledonian canal are also obviously large enough too, and generally unrestricted but the access is limited except from the canal itself (which does have Rules) especially for large ribs.
The other lochs which spring to mind are loch awe, and loch morar the latter certainly requiring a permit to use in a powerboat. Other places are probably too small except for sibs, or perhaps some water skiing. Fishing is possible but will need a permit inland.