David Burch Navigation Blog

Official US charts with chart numbers started with the founding of the US Coast Survey in 1807 that evolved through several forms into the m...

All paper charts across the country were discontinued at the end of last year, leaving electronic navigational charts (ENC) as the only offi...

We designed the Training Mode supplement to qtVlm to be available to all schools that teach marine navigation or weather. The getting_starte...

A unique feature of qtVlm that is a powerful training tool is its ability to share AIS positions amongst simultaneous users. We can have, fo...

There is a video of this article linked at the end.   A few years ago we analyzed the grounding of the Ever Given in the Suez Canal just a f...