we started off by chatting about the harbour ; apparently there had been a flotilla of gunboats there in the past , so it was quite substantial , and i had always fancied a boat , but then one thing led to another and we ended up on the subject of security of the whole place , and he imagined that sooner or later the private security firm would have to go , replaced with something in-house , perhaps with a high tech passive surveillance back-up .