From (Earth Sciences / Physical Geography) Austral informal,
A map drawn on the ground with a stick, or any other roughly drawn map.
These are jpg images that can be printed on A4 paper, 24 sheets in the set, show most of the Kimberly river entries based on work completed by the catamaran Topaz of 1 M draft with added notes from Wings with Nan and Rick.
We used some of these in our journey through the Kimberley and found them invaluable.
BUT IT MUST BE NOTED, the monsoonal rains in the Top End can alter rivers and their entries, so take these MUD MAPS as advisory only. Ultimately you are responsible for the safety of your ship and crew. These are dangerous waters no matter how many gadgets on board or how many miles sailed.
There are FOUR LARGE files containing 6 mud maps each
OR individual files are available: