The RESTCo Multi-functional Shallow Water Skimmer Workboat
1/5th scale model shown above
Description and Overview
The vessel hull is relatively square to maximize storage space and flotation while keeping the
vessel draft to a minium. The flat bottom at the sides maximizes the area weight is distributed over,
important when moving over thin ice surfaces.
The centre section of the hull is slightly higher than the sponson sections at the sides. This includes
an inclined plane section. This centre section forces floating material to the collection tower which
spans the centre channel in the hull.
Linear Propulsion (LP) Drive
The patented Linear Propulsion drive is the key to making a very shallow yet versatile boat. Without
a conventional propeller which would strike ground or water bottom in shallow water or traversing short
expanses of 'dry' surface. Our hydrodynamic 'tread' pattern creates a 'jet' of water and propulsive force.
Using a soft material allows for good grip on ice, and low pressure means a big
contact patch when on ice or ground. As the LP drives on either side are driven independently, 'skid
steering' can provide directional control (including putting one drive in reverse and the other in
forward to maximize steering action).
Bow 'Bump' Wheels
To absorb shocks when grounding and to help move the vessel over land or areas shallower than the
vessel draft, the combination of the front wheels and Linear Propulsion (LP) drives allows the vessel to
continue moving like a wheeled vehicle, with the LP units providing propulsion on land or in water.
WindTrans High-Volume Low-Speed Pump
The patented WindTrans High-Volume, Low-Speed (HVLS) pump can self prime over 15 metres, be operated
by operator muscle power (but we prefer an electric drive), and is highly efficient. The pump can be used in multiple modes on the
vessel: pumping bilges and storage tanks; moving material from the gravity collection tower to
storage; driving a fire monitor; washing shorelines and near-shore facilities, marina docks, etc.;
spraying bioremediant onto spilled oil, and more.
Gravity Collection Tower and Inclined Plane Hull
The patented gravity collection tower is filled with water to start operation, pulled up from the bottom
using the pump. The bottom of the tower is positioned just below the waterline. As the boat moves over
the water, floating liquids and very small solids are captured by the buoyancy of the material. When
sufficient material has collected at the top of the tower, the pump is run to pull that material out
with minimal water. If liquids are being captured, they are pumped to an on-board storage tank or
bladder. If solids are being collected, they are poured onto a filter basket, so the water can drain off,
capturing only the solids. Larger items are captured in a bow-mounted 'trash gate', which can be raised
periodically and emptied onto the deck. The base of the tower is also protected by a grate which
prevents potentially damaging items from being pulled into the pump.
Adsorbent Conveyor Collector
The optional Conveyor Collector is mounted at the bow. Made of an oil-adsorbent material, it provides
a 'solid' barrier for materials larger than 10 microns. Collected material is dumped onto a large filter
basket, which allows water to drain out, but oil and solid materials are trapped for subsequent recovery or
The folding bow ramp facilites loading and unloading of equipment (e.g. an ATV), supplies and people.
The optional bow sweeps increase the effective width of the boat for skimming operations.
Configurable Deck Plates and Storage Space
The deck plates can be used to cover cargo in the bottom of the boat, support more material
above, or be stowed to provide bench seating for occupants.
Movable Cargo Hoist
The cargo hoist mast can be positioned at multiple places on the boat. This allows it to be used for
installing or removing an outboard motor, placing and lifting the gravity collection tower, raising or
lowering items through the moonpool or at the side of the boat, loading and
unloading cargo, moving or positioning the conveyor collector unit and drain basket, and other lifting
and positioning activities.
Folding Control Console
When a larger flat deck is needed, the control console can be folded down and covered with a deck
plate. This also enables stacking of mulitple boats for storage or transport.
Removable Safety Railings
Safety railings are an important feature on flat deck vessels, but are an obstacle for loading and
unloading people, gear and supplies. Therefore, the SWS has safety railing for the entire vessel
perimeter, but they can be removed as convenient for on and off-boarding.
Your Voice - What Else Do You Need a Small Boat to Do?
As of June 2019, RESTCo is seeking a partner to help refine our design, support building and
fitting out our first full-size prototype(s), and evaluate them in real-world conditions.
If that's of interest to you,
let us know.