Crossing Saginaw Bay was the first time K and I had been out of site of land on either of our cruisers. We navigated with our MacENC laptop which has its own gps antenna, and we have two back up gps systems: the boat's built-in chart plotter and my iPhone Navionics system. We also had a portable Garmin chart plotter but it ran out of batteries and stopped working after a few days even though I plugged it into the cigarette lighter at the helm! In addition to the electronics I kept track of our position by dead reckoning, which means simply traveling a constant speed from a known position fix at a known course bearing. If you know how much time has elapsed since the last fix you know where you are. On this trip I used a kitchen timer and marked our position on our paper chart every hour. Electronics are nice but I really enjoy using paper charts and we had them for all the waters we traveled.
The water was smooth across Saginaw Bay and we turned north and went up the Michigan shore to Thunder Bay. Our stop tonight was Alpena, and the city is about 9 miles to the west from the buoy marking the bay entrance. We docked at the city dock, which is called the Thunder Bay Shores Marina. My cousin Shad lives in Alpena and we were anxious to see him and Anna. Shad took us on a tour of the town and his house. We were unable to see the Great Lakes Heritage Maritime Center in Alpena due to the time we arrived, hopefully we can visit next time we come by. Since it was the Fourth of July, a concert was being held outdoors by the waterfront. We grilled hamburgers and watched fireworks from the boat and had a great visit with Shad and Anna.
Pride of Michigan docked at Alpena |
You call it "dead reckoning."
ReplyDeleteEli would call it a distance, rate and time problem. *grin*
Hmm. We gotta get him on the boat to help you navigate! I see some practical math opportunities here!!
~ Dana