Provides maximum performance for light-weight sailors


The JS-4700 is in its prototype development stage. The hull geometry is typical of Australian skiff hull form.

  • The hull-deck join geometry (gunnel flange geometry) takes the overall beam out to 2 metres. This flared topside allows for light-weight sailors to achieve maximum performance of the boat relative to their body weight.
  • The hull, rudder and centreboard geometry maintain the helm balance and control properties through a large range of heel and leeway angles. This benefits all helmsmen independent of their weight.
  • Similar to other boats in the JS Yachts range, this dinghy has optional sail and spar plan configurations.
  • Laser replica sail and spar configurations are interchangeable with JS Yachts design proprietary configurations.


4.70 metres
1.95 metres
Sail Area Options:
6.5m2, 8.5m2, 10.5m2
Sail Cloth Options:
Dacron, Mylar
Spar Options:
Alloy and/or Carbon Composite
GRP / Carbon Composite
XSP, Indonesia
Hull / Deck Moulding, Daggerboard and Rudder from $6,500 AUD


The JS designs: JS-4300, JS-4600, JS-4700, JS-4800 and JS-4900 represent a body of work (design, evaluation and engineering) that has been carried out over the past 5 years. All designs contain the same “core values” of the famous Laser – “minimalism and simple”

Sail and spar options to allow for sailors independent of skill, stature and weight

Depending on skill level and sailor’s size, sail and spars are optioned with sail area and spar dimensions to suit. For entry level, to minimize costs, dacron sails and aluminium spars can be employed ie beginners and recreational sailors. For advanced level performance sailors, carbon composite spars and mylar sails are available.

Single or double handed crew potential

The JS-4700 is primarily designed for single-handed sailing, The JS-4700 can also be sailed double handed.

Deck and spar equipment is ergonomically user-friendly for all skill levels

Independent of a sailor’s size and skill level, placement of all control lines for adjustment allow for easy access and operation.

Structural lifelong durability

Material selection and scantling (specific dimensions for structure) have been engineered to ensure lifelong integrity of all parts of the JS-4700 – hull/deck, appendage mouldings and spars.

Low cost maintenance: minimal/non- complex

The number one rule of boat design/building is that there should be easy access to all mechanical fastenings and equipment. The core value of “simplicity” underpins the design of the JS-4700. Most of the fittings can be easily accessed for service and/or replacement. The JS-4700 features two proprietary inspection ports and one catalogued inspection port that provides storage for personal items.

Built for both recreation and performance / sailing

Spar and sail plan selection, along with control lines set up, allows for sailors to achieve their sailing potential sailing and handling skills of the JS-4700. The JS-4700 supports novices/beginners extending to the most advanced and experienced Olympic sailors. Every sailor can enjoy the JS-4700 at a recreational as well as at a superior performance level.

Vang, cunningham and outhaul: single or split (port & starboard) set up

The standard set up of the JS-4700 is the same single line set up as on the Laser. Optional set up for a split system for the JS-4700 is by way of attaching additional blocks and jam cleats. Positions for these are marked up on the deck moulding should the sailor choose this option after purchase. Alternately these can be factory-fitted.

Toe straps adjustable to suit hiking style and sailor size

The toe straps selected for the JS-4700 provide the best connection for the JS-4700 boat’s dynamics. The JS-4700 toe straps allow each sailor to hike hard and for longer whilst keeping your feet relaxed.

Hull and appendage geometry optimized for sail plan – helm and balance properties

The JS-4700 has undergone rigorous evaluation of hull form and centerboard and rudder configurations to validate helm and balance properties.

Spar material: optional – carbon composite and /or aluminum

Depending on skill level and sailor’s size, spars are optioned with spar dimensions to suit. For entry level, to minimize costs, aluminium spars are available ie beginners and recreational sailors. For advanced level performance sailors, carbon composite spars are available.

Sail material: optional – mylar or dacron

Depending on skill level and sailor’s size, sails are optioned with sail dimensions to suit. For entry level, to minimize costs, dacron sails are available ie beginners and recreational sailors. For advanced level performance sailors, mylar sails are available.


The JS-4700 mainsheet is centrally located on the boom with the purchase system at a 4:1 ratio.

Rudder configurations: fixed or pivoting

Standard rudder configuration on the JS-4700 is fixed. An optional pivoting rudder configuration is also available. The pivoting rudder configuration is similar to the Laser.

Hull and deck structure: cored composite carbon & glass

The JS-4700 hull and deck mouldings are a cored composite carbon and glass laminate structure. The JS-4700 hull and deck is chemically and mechanically fastened. Additional reinforcing laminate is located in way of all mechanical fastenings.

Optional Upgrades & Accessories

  • Composite Carbon Spars
  • Mylar Sail (size optional)
  • Pivoting (swing) or cassette rudder assembly
  • Dual (port/starboard) control line set-up
  • Launching trolley (316 stainless steel)
  • Ripstop transport top cover
  • Ripstop transport undercover
  • Ripstop regatta top cover
  • Padded comb bag
  • Padded rudderstock/tiller bag
  • Mast padded cover – bottom part
  • Mast padded cover – top part )
  • Padded boom cover

Other Dinghies in the Range



Design parallels the single-handed Laser on all aspects.

Length: 4.30m
Beam: 1.38m



For sailors going back to no-fuss single-handed dinghies

Length: 4.80m
Beam: 1.55m


Today's Icon

Exhilarating hiking single-handed performance on a contemporary classic design

Length: 4.90m
Beam: 1.38m
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