Jefferys also includes on the chart a great deal of hydrographical information around the Florida Peninsular and around the Islands of the Bahamas.  This includes soundings and channels.  He also marks sandbanks, reefs currents, anchorages and includes 'rhumb' or 'loxodromic' lines (taken from an initial bearing  it is a line on a sphere that cuts all meridians at the same angle. It is the path taken by a ship that maintains a constant compass direction).  Such lines were only really useful in waters which were bounded by not too distant land fall as they did not take account of the curvature of the earth.

The inclusion of ships to illustrate the passage through the New Bahama Channel not only decorates the chart but it also highlights the economic importance of the area at the time. 

Jeffreys includes some cartographic detail on the mainland Florida Peninsula which includes land relief shown pictorially, rivers, lakes and fresh water sources.  Interestingly enough he includes no settlements, towns or ports other than that of St. Augustine on the north east coast.

Overall, the chart does everything one would want as an arm-chair sailor back in London.  It is informative, artistic and historic, but one wouldn't want to navigate by it.