Consider this. While not "necessary" paper charts
have the benefit of giving the navigator the "bigger" picture. For instance, I had a delivery
which required me to sail down Delaware Bay, Delaware. We had all that latest navigation tools including a large GPS
Display with Radar
integration. We were barreling down the river entering the bay in 30kt Northwest breeze. Coming up fast was Brandywine shoals, which was not readily apparent on the plotter. I had a chart book which contained a chart of Delaware Bay where the shoals and lighthouse where hard to miss. So many times, the limited chart plotter display gives a false sense of security
. Charts give the bigger picture.
There are really several tools indispensable when deduced or dead reckoning.
A good pair of binoculars, a reliable depth
sounder, and a pelorus or hand held compass. It would be nice to know speed. Charts have the added advantage of being able to write on. Charts will also introduce oneself to the Compass Rose. Deviation and Variation are just nice to know. I have sailed hundreds of miles with just a box compass, hand held compass, binoculars and a long pole to assess depth. That was a long time ago. But when that buoy you were hoping to sight appears out of the fog
after an hours run, well you just have to experience it.