It is a fuel tank, baring any esoteric definitions. He might be a seasoned
sailor, or he might be an hvac technician, who would also call "certain"
fuel filled tanks, daytanks. In the mechanical trades, they're part of an
elaborate fuel delivery system that offers a few benefits over the
conventional main tank to fuel pump relationship.
Scout

"Bart Senior" wrote in message
. net...
I got these from a Dutch Sailor who built his own boat.
A short conversation and a single observation proved to
me that this fellow was an experienced sailor.

[3 pts]

What is a day tank?

How is it used?

Why would you want one?