Sealock

At Corpach it is intended to form a sealock, to be cut out of the rock, and to make a small basin within it, capable of admitting a number of vessels with the flowing tide, which, after the gates are closed, may ascend the locks at leisure, […]

All masters are prohibited from approaching the entrance to the sealocks when they observe a red flag flying […]

Ardrishaig, situated about halfway up Loch Gilp on the west shore, marks the entrance to the Crinan Canal, which is entered through the sealock behind the breakwater.