ADB 420 · Welded aluminum
The ADB 420.In five chapters.
Thirteen feet nine inches of welded aluminum, designed for a family of four and the three friends they bring along. Everything below is the boat as drawn and built. Where a number is not yet measured on the water, it says provisional.
Plan view
Texas, 2026
01 / 05 · The hull
The hull
Welded aluminum, chromated and powder coated, with a self-draining deck and a full keel guard.
- Length overall13 ft 9 in / 4.20 m
- Beam overall6 ft 10 in / 2.08 m
- Plate5052 aluminumprovisional
02 / 05 · The tubes
The tubes
Independent chambers at 19.7 inches. The color is not an option list: it is the point.
- Chambers4provisional
- Tube diameter19.7 in / 50 cm
- Rubbing strakeHeavy duty
03 / 05 · The deck
The deck
Three feet six inches of clear width between the tubes. That is what lets four adults sit without anyone perched on a tube.
- Inside width3 ft 6.5 in / 1.08 m
- Max load1,742 lb / 790 kgprovisional
- SoleEVA, self drainingprovisional
04 / 05 · The console
The console
Glass, wheel, and nothing you will not use. The rollbar carries the lights and the ski pole.
- RollbarAluminum, with lightsprovisional
- Ski poleStainless steelprovisional
- StorageConsole and rear lockerprovisional
05 / 05 · The power
The power
Sixty horsepower is the builder's recommendation on this hull, and on a boat this size it is enough.
- Recommended power60 hp
- ShaftLong
- Fuel tank15.9 gal / 60 L built inprovisional
- BatteryLithium
Specifications
All of it, on one page.
Design category, maximum persons and certified weights are published once the hull is measured and certified, not before.
- Length overall13 ft 9 in / 4.20 m
- Beam overall6 ft 10 in / 2.08 m
- Plate5052 aluminumprovisional
- Chambers4provisional
- Tube diameter19.7 in / 50 cm
- Rubbing strakeHeavy duty
- Inside width3 ft 6.5 in / 1.08 m
- Max load1,742 lb / 790 kgprovisional
- SoleEVA, self drainingprovisional
- RollbarAluminum, with lightsprovisional
- Ski poleStainless steelprovisional
- StorageConsole and rear lockerprovisional
- Recommended power60 hp
- ShaftLong
- Fuel tank15.9 gal / 60 L built inprovisional
- BatteryLithium
Build record
Where the first boat stands.
- 01 · complete
Design
Hull form, deck plan, console and proportion are resolved. The boat is designed before anything is cut.
Build, rigging, commissioning and water test are added here when they happen.
Warranty
Built to be covered.
10yr
Tubes
Full coverage on seams and fabric, when the boat is registered within 60 days.
5yr
Hull
Structural welds on the welded aluminum hull.
2yr
The whole boat
Finishes, upholstery and every part ADB makes.
US
Coverage
For boats registered, kept and used in the United States.
