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Getting detailed weather forecasts, working from the saloon, holding a video conference, or simply staying in touch with the mainland now requires much more data than just a weather report and a few emails. Starlink has played a major role in this shift in scale, but it isn?t the only player in the field. OneWeb, Kuiper, Viasat, HughesNet, Iridium, and Inmarsat are based on different architectures and use cases. For a boater, comparing these networks therefore starts less with the listed price and more with a simple question: what actually happens between the onboard antenna and the satellite?
LEO or GEO?the orbit directly affects the onboard experience
The first difference lies several hundred?or even tens of thousands?of kilometers above the bridge.
Starlink, OneWeb, Kuiper, and Iridium operate satellites in low Earth orbit (LEO). According to publicly available information, Starlink reports latency ranging from 25 to 60 ms, compared to approximately 70 ms for OneWeb and 30 to 40 ms for Kuiper.
This low latency is crucial on board as soon as communication becomes interactive. Video conferencing, remote access to a computer, and certain business applications do not perform well with a round-trip delay of several hundred milliseconds.
Viasat and Inmarsat, on the other hand, rely on geostationary satellites, or GEO satellites. The distance traveled by the signal results in a reported latency of 600 to 800 ms for Viasat and 600 to 700 ms for Inmarsat.
This delay does not affect all functions. You can still download files, receive emails, or retrieve certain information. However, it becomes much more noticeable when an app requires rapid data exchange.
And speed tells only part of the story. The data provided shows speeds of up to 260 Mbit/s for Starlink in the first comparison, 200 Mbit/s for OneWeb, 150 Mbit/s for Viasat, and 100 Mbit/s for HughesNet. Kuiper, for its part, claims speeds of up to 400 Mbit/s, but its deployment is still described as partial as of 2026.
At sea, a satellite dish must first be able to see the sky
On a boat, the quality of the connection does not depend solely on the constellation.
A Starlink antenna needs a sufficiently unobstructed view of the sky. This is a detail that becomes much less trivial on a sailboat. The mast, boom, and sails can temporarily block the area the antenna is pointing at.
The problem is therefore not exactly the same as it is in a house, where the terminal remains fixed against a stationary sky. On board, the boat rolls, pitches, and changes course. On a sailboat, the rigging and sails also move relative to the antenna.
Choosing the location is therefore an integral part of the installation. An antenna placed under the boom or in a crowded area may experience interruptions when the line of sight is obstructed.
This limitation also serves as a reminder that coverage advertised as ?global? does not mean that all systems operate the same way everywhere. Starlink is advertised as being available in more than 150 countries. Iridium, for its part, stands out for its coverage that includes the polar regions. Inmarsat offers nearly global coverage, with the exception of the poles.
Whether it?s an coastal cruising trip, an offshore crossing, or a voyage to high latitudes, the term ?coverage? does not refer to the same thing in each case.
Starlink and OneWeb aren't aimed at the same market
Comparing only data rates can result in services designed for different users being placed in the same column.
Starlink's information covers residential, business, and maritime users. This diversity makes it directly relevant to recreational boat owners looking for an internet connection on board.
OneWeb is taking a different approach. The constellation, operated by Eutelsat, is geared toward businesses, government agencies, and mobility applications?particularly ships and aircraft. It is not marketed as a service intended directly for individual boaters.
Its advertised speed reaches 200 Mbit/s, with a latency of approximately 70 ms. The network also prioritizes business applications and symmetric data transfers. However, the listed price starts at over $500 for business solutions.
The difference, therefore, goes beyond the technical specifications. An owner equipping his sailboat for a few weeks of cruising and an operator who needs to keep a ship constantly connected are not purchasing the same service, even when both are using a LEO constellation.
Kuiper adds another unknown factor. Amazon?s network is advertised with speeds of up to 400 Mbit/s and a latency of 30 to 40 ms. However, as of 2026, the available information indicates that its commercial deployment and coverage remain limited. It is therefore important to distinguish between the advertised performance and the services actually accessible to a user within their coverage area.
Iridium and Inmarsat remain in the running for different applications
A fast connection and critical communication do not necessarily meet the same requirements.
Iridium is a good example of this difference. Its LEO constellation covers the entire globe, including the poles. In contrast, Iridium Certus is rated at 704 kbit/s for download and 352 kbit/s for upload.
Compared to the hundreds of Mbit/s advertised by LEO internet networks, the gap is considerable. But comparing only these figures would be like comparing the top speeds of a dinghy and a trawler.
Iridium is primarily designed for voice calls, messaging, small amounts of data, critical communications, weather updates, and situations where geographic coverage takes precedence over bandwidth. For offshore or polar navigation, this approach therefore remains particularly relevant.
Inmarsat belongs to yet another category. Its GEO network has long been used in maritime and professional applications. According to the information provided, Inmarsat GX reaches speeds of up to 50 Mbit/s. However, its latency of 600 to 700 ms is inherent to the distance from geostationary satellites.
The device and subscription are also presented as significantly more expensive than solutions intended for the general public. Inmarsat thus positions itself more in the realm of professional maritime equipment than in that of a router installed for a summer cruise.
Viasat and HughesNet Highlight the Limitations of Geostationary Satellites
LEO constellations have not replaced GEO networks, but they have changed the criteria for comparison.
Viasat advertises speeds of up to 150 Mbit/s, with latency ranging from 600 to 800 ms. HughesNet is listed as offering speeds of 25 to 100 Mbit/s and latency of approximately 650 ms.
These data allowances are still suitable for Internet uses that can tolerate significant latency. They are less suitable for interactive communications. Data policies also come into play. Plans advertised as "unlimited" may throttle speeds once a certain data allowance has been used up. For HughesNet, the threshold is between 100 and 200 GB.
On board, this detail deserves more attention than it might seem at first glance. With several crew members connected, device updates, video streaming, and remote work, the volume of data transferred quickly increases.
The monthly cost alone is therefore not enough to decide between two plans. The actual usable data allowance, traffic priority, latency, and coverage conditions are just as important as the advertised maximum speed.
Ultimately, the right network depends on the browser program
Based on the available information, there is no satellite network that combines the highest data rate, the widest coverage, the lowest latency, and the lowest cost.
For boaters primarily looking for high-speed internet access, LEO constellations are a game-changer. According to the data provided, Starlink offers extensive international coverage, latency ranging from 25 to 60 ms, and data rates of several hundred Mbit/s. Its main limitations include the cost of the equipment and the need for an unobstructed view of the sky.
OneWeb is better suited for business installations. Kuiper is emerging as a LEO competitor set to begin deployment in 2026. Viasat and HughesNet continue to use a GEO architecture with significantly higher latency.
And as soon as internet usage moves beyond traditional applications, the hierarchy shifts once again. Iridium prioritizes global coverage and low-bandwidth communications, while Inmarsat maintains its focus on professional maritime applications.
When equipping a boat, the question is therefore not just which provider offers the highest Mbit/s speed. The actual specifications are determined by the navigation area, obstacles around the antenna, the need for real-time communications, data volume, and the critical nature of the connection. At sea, as elsewhere, choosing a connection starts with knowing what you want to use it for.
