You may notice increased schedule adjustments or restrictions on certain routes over the next few weeks and into the summer months. We get asked a lot - why? We’ll break it down for you. These adjustments and restrictions are scheduled in advance and they’re due to tidal currents. On our Port Townsend/Coupeville route, the tidal currents during low tide in Keystone Harbor create treacherous conditions in an already tricky spot. Keystone Harbor is already notoriously difficult to navigate and the