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Masthead Sloop · Lifting Keel · 1977–present
The Irwin 12 Ton MKII is a revised version of the earlier Irwin 12 Ton, featuring a transom-hung rudder, drop/dagger keel, softer chine, and broader beam aft.
Is it for you?
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
A balanced, easily-driven cruiser — comfortable and forgiving for coastal work.
The record
The complete reference set — tap any figure to switch between metric and imperial.
The family
Nearby designs by size, type, and era — worth a look alongside her.