The Directors of the Grand Canal Company hereby give notice that they will SELL, to such parties as may require them, NINE SWIFT PASSAGE BOATS, and TWO HEAVY NIGHT PASSAGE BOATS, several of which are in perfect repair, and of the following dimensions, viz:—
FLY BOATS
Average length, from Stem to Stern, 60 feet, and average breadth of beam, 6 feet 6 inches.
NIGHT BOATS
Average length 60 feet, and breadth of beam, 7 feet 9 inches.
Applications from parties desirous of purchasing same to be addressed to the Secretary.
By Order, JOHN M’MULLEN, Sec, Grand Canal House, William-street,
11th February, 1848
Dublin Evening Mail 25 February 1848
Irish waterways history 
A fly boat would make a nice modern canal cruiser.
Not so good on lakes, though. bjg