NorthStar 957 Operator's Manual page 4

Northstar products are designed to be very useful navigation
tools, but they are not substitutes for good seamanship. The
prudent navigator should never rely on any single device as the
sole source of navigation guidance. Exercise caution and good
judgment when underway.
The electronic chart is an aid to navigation designed to facili-
tate the use of authorized government charts, not replace
them. Only official government charts and notices to mariners
contain all the information needed for safe navigation, and, as
always, the user is responsible for their prudent use.
CAUTION!
CAUTION!