My father used to work on ammunition-dumping boats out of Rosyth and Crombie. They took cargo of ammo from Bandeath and dumped it in deep water off the May Isle. He got me on a sailing from Crombie to Bandeath once. The highlight of those trips was to see if you could cause the local bus to be delayed by the opening of the Kincardine bridge to allow the boat through. The skipper would have all eyes peeled for sight of the bus and would try to time his approach accordingly.
There was an old woman used to come out and wave a tea towel when the boat sounded her horn to ask for the bridge to be swung open. On the trip I was on, the skipper was drunk and caused the boat to go too far astern and rammed the pier at Crombie, before we even got started.