Air Cradles

The Penumbra Marine Logistics (PML) Air Cradles started as a fun idea in the Ft. Lauderdale PML facility back in 2006.  Today there are now dozens of “Hover Cradles” on yachts all over the world with everything from Wave Runners, Tenders, furniture,  Exercise equipment, to Personal Submarines weighing close to 10 tons.  The largest cradle we built to date is rated for over 20 tons although capacity is almost unlimited.

Cradles are custom made per application or special requirements from the yacht owners, captains, or shipyards.

The Hover Cradles operate on only 3-4 bar (~45-60 psi) and hover only a few millimeters off the deck or any smooth surfaces that is free of cracks, holes, hatches, etc.  Cradles work on air pressure being maintained below the pads.

Available in:

  • Powder Coated 304 Stainless Steel
  • Polished 316 Stainless Steel
  • Powder Coated Steel

Cradle construction varies, as does the construction time and cost. The Powder coated 304 Stainless Steel is the most popular, followed by the highly polished 316 Stainless Steel. Additional weeks of polishing is required for the stainless.  This and the materials drive the cost up considerably.   We have been asked to build units in mild steel and powder coat but do not recommend.

42,500 Lb. (19,300 Kg) lifting capacity for this 10 ton Triton 3300 submarine aboard the yacht, Axis.










Hovering 7,300 kgs. (16,000 lbs.) at the Triton Submarine Facility using 3-4  Bar of air pressure.

Treadmill: 675 lbs