Frog (dinghy)
Encyclopedia
The Frog is a small dinghy with an approximate length of 7'10" and an approximate beam of 4'. Its sprit and foresail
rig has 40 square feet (4 m²) of sail area.
Foresail
A foresail is one of a few different types of sail set on the foremost mast of a sailing vessel:* A fore and aft sail set on the foremast of a schooner or similar vessel....
rig has 40 square feet (4 m²) of sail area.