Specifications
Number of crew 2-5 LOA 6100 mm (20 ft) LOD 4600 mm (15 ft) Beam 2000 mm (6 ft 6 in) Draft 380 mm (15 in) Displacement Displacement (ship) A ship's displacement is its weight at any given time, generally expressed in metric tons or long tons. The term is often used to mean the ship's weight when it is loaded to its maximum capacity. A number of synonymous terms exist for this maximum weight, such as loaded displacement, full load... (without ballast) 380 kg Sail area of total ketch rig 13.94 m² (150 ft²)

The Jolly Boat is a 15 foot (4.6 metre) ketch rigged open day-boat designed by J. Laurent Giles. Originally designed for plywood

Plywood

Plywood is a type of manufactured timber made from thin sheets of wood veneer. It is one of the most widely used wood products. It is flexible, inexpensive, workable, re-usable, and can usually be locally manufactured...

 construction, more recent examples were made with GRP

Glass-reinforced plastic

Fiberglass , is a fiber reinforced polymer made of a plastic matrix reinforced by fine fibers of glass. It is also known as GFK ....

 with plywood decks and bulkheads, manufactured by AJS Marine in Chichester

Chichester

Chichester is a cathedral city in West Sussex, within the historic County of Sussex, South-East England. It has a long history as a settlement; its Roman past and its subsequent importance in Anglo-Saxon times are only its beginnings...

. The standard specification was described as a yawl

Yawl

A yawl is a two-masted sailing craft similar to a sloop or cutter but with an additional mast located well aft of the main mast, often right on the transom, specifically aft of the rudder post. A yawl (from Dutch Jol) is a two-masted sailing craft similar to a sloop or cutter but with an...

 rig, however the mizzen mast is mounted forward of the rudder making the rig a ketch

Ketch

A ketch is a sailing craft with two masts: a main mast, and a shorter mizzen mast abaft of the main mast, but forward of the rudder post. Both masts are rigged mainly fore-and-aft. From one to three jibs may be carried forward of the main mast when going to windward...

 (in modern terminology, see yawl: historical usage) although this is unusual for so small a boat. The foresail

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....

 is mounted on a bowsprit

Bowsprit

The bowsprit of a sailing vessel is a pole extending forward from the vessel's prow. It provides an anchor point for the forestay, allowing the fore-mast to be stepped farther forward on the hull.-Origin:...

. A sloop

Sloop

A sloop is a sail boat with a fore-and-aft rig and a single mast farther forward than the mast of a cutter....

 rig version was also available. In the ketch configuration the mainsail is gaff rigged and the mizzen a balanced lug. A steel centre plate and ballast makes the boat quite stable, and the high topsides, broad beam and large cockpit are designed with comfortable family cruising in mind. An outboard well on the port side is provided for a 4h.p.  outboard motor

Outboard motor

An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom and are the most common motorized method of propelling small watercraft...

.