How can you be lost at SEA????
No matter what direction you go, you will run into land sooner or later.
Off the East Coast of N America? Follow the sun, you will arrive on the coast very soon unless you are in the East Atlantic.
Presuming no ocean currents and no change in wind speed or direction during daylight hours and no clouds....
You're off the East Coast of N America.
You get up and set sail as soon as you can discern the rising sun. You follow the sun until you can no longer see it.
Other than maybe being a tad further south than where you started, where are you?