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Seaglider vs. Hydrofoil Ferry: Speed, Range, Capacity, and Route Limits

REGENT’s Viceroy is specified to be much faster than a conventional hydrofoil ferry, but carries far fewer passengers and is still in development. Range and route claims need careful qualification.

By CarCody Team 4 min read
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REGENT’s Viceroy Seaglider is designed to cruise at 160 knots and travel 160 nautical miles at battery end-of-life, carrying 12 passengers and two crew. By comparison, operating Liberty Lines hydrofoils are listed at roughly 31–38 knots and carry about 184–325 passengers, depending on the vessel. The key qualification: Viceroy’s figures are manufacturer specifications for a craft in development, not proven scheduled-service performance.

How do their speed, range, and capacity compare?

Measure REGENT Viceroy Seaglider Liberty Lines hydrofoil examples
Speed 160 knots cruise, on REGENT’s current Viceroy specification page; a June 4, 2025 REGENT FAQ instead says up to 180 mph. These are company-published figures for a developing craft. About 31–38 knots across named vessels in Liberty Lines’ fleet listings.
Range 160 nautical miles at battery end-of-life on the current product page. REGENT’s June 4, 2025 FAQ says up to 180 miles (300 km); the pages do not explain the difference. Not stated for the selected hydrofoils in the cited Liberty Lines fleet information.
Passenger capacity 12 passengers plus two crew, per REGENT’s current specification. About 184–325 passengers, depending on the named hydrofoil.

The contrast is between a small craft designed for high speed and large passenger ferries designed to carry many more people per departure. It is not a controlled comparison of equivalent vessels: the figures come from different operators and describe different craft and operating contexts.

How fast is a Seaglider compared with a hydrofoil ferry?

On the current Viceroy product page, REGENT lists a 160-knot cruise speed. One knot equals one nautical mile per hour, making 160 knots about 184 mph. REGENT’s June 4, 2025 FAQ gives a different expression—up to 180 mph. The company does not explain the discrepancy, so the values should be treated as separate published claims rather than merged into one precise performance figure.

Liberty Lines lists individual hydrofoils at approximately 31–38 knots. Even against the upper end of that range, Viceroy’s published cruise specification is several times faster. That does not establish a corresponding reduction in a passenger’s total travel time: a craft’s cruise speed is not the same as an end-to-end journey time, which also depends on the route, port access, boarding, and service schedule.

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How far can a Seaglider travel, and what is known about ferry range?

REGENT’s current Viceroy page lists 160 nautical miles of range at battery end-of-life. That qualification matters: it is the company’s stated range at the battery’s end-of-life, not a guarantee that every route can be operated at that distance under all conditions. The June 4, 2025 FAQ says up to 180 miles (300 km), a slightly different figure and unit. One hundred sixty nautical miles is about 184 statute miles; the source pages do not reconcile their numbers.

The Liberty Lines fleet information cited here does not state range for the selected operating hydrofoils. A numerical range comparison would therefore be misleading. Route endurance also depends on vessel, speed, loading, conditions, and fuel reserves, so a range number from one craft would not automatically establish the practical reach of another.

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How many passengers can each carry?

REGENT specifies Viceroy for 12 passengers and two crew. Liberty Lines’ listed hydrofoils range from approximately 184 to 325 passengers, depending on vessel. This is a major difference in passenger scale: a Viceroy departure, as specified, carries a small group, while the cited hydrofoils carry hundreds.

Liberty Lines also lists HSC Hybrid vessels separately at 30 knots and 251 passengers. Those are a distinct high-speed hybrid class, not the hydrofoil entries, so their figures should not be combined with the hydrofoil speed range. The operator describes a fleet that includes hydrofoils, catamarans, and monohulls; the vessel used can vary with operational requirements.

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What routes and operating conditions limit a Seaglider?

REGENT describes Viceroy as operating exclusively over water. It starts in hull mode, accelerates onto hydrofoils, and then flies close above the surface using ground effect. That design points to water corridors and suitable water-access embarkation points; it does not mean the craft can use any ferry route or harbor. Whether a specific route works depends on infrastructure, route approvals, operating rules, weather and sea conditions, and the ability to support charging and emergency procedures.

Sea state is a design claim, not an all-weather guarantee

In its June 4, 2025 FAQ, REGENT says Viceroy is designed to take off and land in waves up to 5 feet and fly over waves up to 13 feet. The company says the latter limit is constrained by emergency-landing considerations. These are manufacturer-stated design capabilities, not independent certification or a guarantee of operation on a particular route or in particular weather.

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Ports, approvals, and service status matter

REGENT’s FAQ says the full-scale prototype has been undergoing sea trials since 2025 and describes a maritime regulatory pathway. The available company information does not establish final passenger certification or approval to operate a specific public route. No launch date or scheduled passenger service should be inferred from the published specifications.

Liberty Lines operates island and coastal connections around Sicily and nearby islands. A published route and timetable, plus the operator’s actual vessel assignment and conditions on the day, are more relevant to a ferry passenger’s journey than a vessel’s maximum speed alone.

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Which is faster in practice?

The published numbers suggest substantially higher cruise speed for Viceroy, but they do not prove a specific journey-time saving. A like-for-like trip comparison would need the same origin and destination, route, port access, boarding and turnaround time, schedule, and operating conditions. The cited sources do not provide that comparison, nor do they establish an operating Seaglider service against which to measure it.

For a practical choice, compare the complete trip and the service that is actually available: departure times, access to the departure and arrival points, passenger capacity, and whether the route is operating in the expected conditions. Viceroy’s headline speed is a design specification; an operating ferry’s schedule reflects a real service.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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