Sinn watch 240 st gz vintage dark brown 240 st gz vintage dark brown anyone who is at home on the worlds seas either as a skilled sailor or a keen water sports enthusiast knows how important it is to keep an eye on the weather the tides are often just as important because they go a long way towards determining how things pan out whichever port youare heading for it is crucial to take a close look at the local tide table to work out the current tidal range it is just as essential to keep