Starlink, WiFi and Internet at Sea: The Complete Guide for Boats and Yachts

Ten years ago, being offshore meant being offline. You paid several dollars a minute for a scratchy satellite phone call, you rationed email, and streaming anything was a fantasy. That world is gone. Starlink for boats changed the economics of connectivity so completely that owners now expect the same internet on a mooring in the Bahamas that they have in their living room. If you run a vessel, refit one, or work aboard as an engineer, understanding yacht WiFi is no longer a nice extra. It is a core system, as expected as the watermaker or the air conditioning, and the person who installs and maintains it has become one of the most valuable people on any modern boat.

This guide covers boat internet from the antenna on the arch down to the tablet in the guest cabin. We will go through every Starlink plan that matters for marine use, the hardware you actually mount, real power draw in watts, how to combine Starlink maritime service with 4G and 5G cellular and VSAT failover, which routers hold it all together, where offshore coverage still bites you, and what the whole system costs in 2026. We will also talk about who does this work, because marine internet is a trade, and a good installer earns their day rate the first time a charter guest gets to post their sunset photo without a hiccup.

Why Starlink rewrote the rules for yacht WiFi

Before low earth orbit satellites, marine internet came from two places. Coastal boats used cellular, which meant a 4G modem, an external antenna, and a hard cliff of nothing once you passed the last cell tower, usually somewhere between eight and twenty miles offshore depending on terrain and carrier. Everyone else used VSAT, geostationary satellite broadband that worked anywhere in a footprint but delivered painful latency, tight data caps, and monthly bills that ran into the thousands. A 4 Mbps VSAT package that cost 3,000 dollars a month was considered generous. Guests hated it and crew apologized for it.

Starlink flipped both problems. Its satellites orbit at roughly 550 kilometers instead of 35,786 kilometers, so latency dropped from around 600 milliseconds to somewhere between 25 and 60 milliseconds. That is the difference between a video call that is unusable and one that feels like the person is next door. Throughput jumped too. A well sited flat high performance dish routinely pulls 100 to 220 Mbps down and 10 to 25 Mbps up, and it does it while the boat moves, pitches and turns. For the first time, boat internet stopped being a compromise and started being genuinely good.

The commercial effect on the yacht industry was immediate. Owners who used to accept being unreachable now run their businesses from the flybridge. Charter brokers list high speed connectivity as a selling point. Crew, who spend months away from family, treat data as a welfare issue on par with food and air conditioning, and captains who ignore that find it much harder to keep good people. Starlink maritime and its cheaper siblings sit at the center of all of this, which is why every serious refit now budgets for it.

The Starlink plans that matter for boats

Starlink sells service under names that have changed several times, and the marketing does not always make the marine differences obvious. For vessels there are three tiers you need to understand: Roam, Priority, and Maritime. They differ in where they are licensed to work, how their data is prioritized on the network, and how much they cost.

Starlink Roam

Roam, formerly called RV, is the entry point and the plan most cruisers actually use. It is designed for land based travel but functions on water within a certain distance of shore, and in practice it works well for coastal and near coastal cruising. Roam is sold as regional or global. The unlimited data version runs around 165 dollars a month in 2026 for the standard regional plan, with a global option closer to 200 dollars. The catch is the fine print: Roam is not licensed for use far offshore or in international waters, its data is deprioritized during congestion so you can slow down in busy areas, and Starlink's terms describe it as being for use while in motion on land, not blue water passages. Many owners run it anyway close to shore and it performs, but you are outside the intended use, and it can be throttled or geofenced.

Starlink Priority

Priority, sometimes bundled under the Business or fixed high performance branding, gives you prioritized data, meaning your traffic gets served ahead of standard Roam users when the local cell is loaded. You buy a monthly data allotment, for example 40 GB, 1 TB or 2 TB of priority data, and once you exhaust it you drop to standard speeds. Priority plans start around 250 dollars a month for a smaller allotment and climb steeply from there. Priority is popular with liveaboards and small commercial operators who need dependable speed but do not go far offshore and do not want to pay full maritime rates.

Starlink Maritime

Maritime is the plan built for vessels, licensed for use in ocean waters including international zones, and it is what large yachts and commercial ships buy. It uses the highest priority data on the network and is designed to keep working in the middle of an ocean crossing, subject to satellite coverage. Maritime is expensive. Plans are sold by data volume, and a typical 50 GB priority maritime package sits around 250 dollars a month while a 1 TB or 5 TB global ocean plan can run from roughly 1,000 to 5,000 dollars a month. For a superyacht owner used to VSAT bills, that is still a bargain for the performance, which is why adoption has been near total in the large yacht fleet.

The practical decision tree is simple. If you stay within sight of land and want the cheapest working solution, Roam. If you liveaboard or run a small charter operation coastally and need speed that does not collapse on a busy weekend, Priority. If you cross oceans or carry paying guests who expect flawless service anywhere, Maritime. Many boats hold two accounts and swap the hardware between plans depending on the season, which Starlink allows through the account portal.

The hardware: dishes, mounts and what actually goes on the arch

Starlink hardware has gone through several generations, and picking the right dish for a boat matters more than people expect. The standard residential dish, the round or rectangular one that motors around to aim itself, is not built for the marine environment. It has moving parts, it is not sealed for constant salt exposure, and it needs to physically tilt, which is a problem on a boat that is already tilting.

Starlink Flat High Performance

The dish you want on a vessel is the Starlink Flat High Performance, sometimes just called the flat HP. It has no moving parts, it uses electronic beam steering to track satellites across a wide field of view, it is designed to run in motion, and it has better weather resistance and a wider scan angle than the consumer units. It also handles heat better, which matters on a metal arch in the tropics. In 2026 the Flat High Performance hardware runs about 2,500 dollars, and the older maritime specific dual dish kits, which paired two units for redundancy, cost considerably more when they were current. For most boats a single Flat High Performance is the correct choice.

There is also a smaller flat unit sold with Roam that costs less, around 500 to 600 dollars, and it works fine for coastal cruisers on a budget. Its scan angle and heat tolerance are lower than the High Performance, so on a boat that sees a lot of motion or a lot of sun the High Performance earns its price difference. If a guest is going to be on a video call while the boat rolls at anchor, the wider field of view of the HP unit keeps the connection from dropping every time the mast swings across the sky.

Mounting

Mounting location is the single biggest factor in how well any dish performs, and it is where a good installer proves their worth. The dish needs a clear view of the sky, ideally an unobstructed hemisphere. On a sailing yacht that is hard, because the mast, boom, spreaders and rigging all block sky, and every time one passes between the dish and a satellite you get a brief interruption. Installers work around this by mounting as high as practical, often on a dedicated pole on the stern arch or on a mast mount, and by accepting that some obstruction is unavoidable on a sailboat. On a motor yacht it is easier, because you usually have a clear radar arch or hardtop with a wide open view aft and to the sides.

The mount itself has to survive years of vibration, salt, and UV. Cheap brackets corrode and crack. Proper marine installs use stainless or anodized aluminum mounts, isolate dissimilar metals to prevent galvanic corrosion, bed every fastener in sealant, and provide a drip loop and gland for the cable entry so water does not track down the wire into the boat. The cable run from a Flat High Performance is a single shielded line to the power supply, and getting that run clean, protected and strain relieved is exactly the kind of detail that separates a professional job from a leaking mess two seasons later.

Power draw: what Starlink actually pulls

Power is where a lot of first time installers get surprised. The Starlink Flat High Performance is hungry. Idle draw sits around 50 to 75 watts, and under active load, especially in cold weather when the built in heater runs to melt snow off the panel, it can spike to 150 watts or more, with brief peaks even higher. The consumer flat dish is gentler, often averaging 40 to 60 watts. Over a full day, an always on High Performance dish can consume somewhere between 1 and 2 kilowatt hours, which on a battery bank at anchor is not trivial.

The other wrinkle is that Starlink hardware is designed to run on its own AC power supply, which means on a DC boat you either run the inverter continuously or you fit one of the DC to DC conversion kits that let the dish run straight off the 12 or 24 volt system without an inverter. Running the inverter all night just to feed a satellite dish is wasteful and adds a second point of failure. A proper install uses a DC power solution sized for the dish, and the electrician confirms the battery bank and charging can carry the extra continuous load. On boats with modest battery capacity, that heater spike in cold climates has caught out more than one owner who watched their state of charge sag overnight.

Starlink is not enough on its own: cellular and VSAT failover

Here is the thing every honest installer will tell an owner: Starlink is excellent, and Starlink alone is not a complete system. It has outages. Satellites hand off, obstructions interrupt, the network has maintenance windows, and coverage has gaps in certain ocean regions and near the poles. A boat that carries paying charter guests or an owner who runs a business at sea cannot rely on a single link. The professional approach is layered connectivity, with two or three independent paths and a router that switches between them automatically.

Cellular 4G and 5G

Close to shore, cellular is often faster and always cheaper per gigabyte than satellite, and it makes an ideal primary link when a tower is in range. A marine cellular system uses an external high gain antenna, often a multi antenna array for MIMO performance, feeding a cellular modem that accepts one or more SIM cards. The best setups carry SIMs from multiple carriers, so when one network is weak the router hunts for the strongest signal. In the Mediterranean or the US coast you can pull 100 Mbps or more over 5G near a good tower, which offloads your satellite data allowance entirely while alongside or at a coastal anchorage. A local prepaid data SIM in each cruising region keeps the running cost low.

VSAT as offshore failover

For vessels that genuinely cross oceans and cannot tolerate any gap, VSAT still has a role as failover. A Sailor VSAT or similar Ku or Ka band system from a marine service provider gives guaranteed coverage within its footprint and a committed information rate, which Starlink does not contractually promise. VSAT is slower and far more expensive per gigabyte, so it is not the everyday link, it is the safety net that carries email, position reporting, weather routing and voice when Starlink drops in the middle of the Atlantic. Many large yachts keep a VSAT dome alongside their Starlink specifically so the bridge and the owner never lose contact. Smaller boats increasingly skip VSAT entirely and accept that Starlink plus a satellite messenger for emergencies is enough for their cruising.

Routers: the brain that ties it together

With two or three connections aboard, you need something to bond, prioritize and fail over between them, and that job belongs to a proper multi WAN router. This is where Peplink dominates the marine market. Peplink routers, from the compact Balance and MAX series up to larger units, accept Starlink on one WAN port, one or more cellular modems on others, and VSAT on another, then manage all of them together.

Peplink's SpeedFusion technology can bond multiple links into one faster pipe or, more usefully for reliability, run hot failover so a video call survives even if the primary link drops mid sentence. The router hands the call to the backup connection fast enough that the person on the other end barely notices. It also does smart outbound policies, so you can route the owner's laptop over Starlink, keep crew streaming on the cheap cellular SIM, and reserve VSAT for critical bridge traffic only. A mid range marine Peplink runs from about 500 dollars for a small unit to 2,000 dollars or more for a capable multi cellular model, and the InControl cloud management adds a small annual fee that lets a shore based IT contractor monitor and fix the boat remotely.

On top of the router you distribute WiFi around the boat with access points, one per deck or cabin zone, wired back to a network switch so that guests get strong signal everywhere without dead spots. A superyacht might run a dozen access points and a managed switch; a 40 foot cruiser needs one good router with built in WiFi and maybe a single extra access point for the aft cabin. The principle is the same at every size: separate the internet source from the local network, so you can change or add connections without ripping out the WiFi.

Coverage and its limits offshore

It is tempting to believe Starlink works everywhere, and for most cruising grounds it does, but the honest picture has edges. Starlink coverage depends on the density of satellites overhead and the location of ground stations that connect the constellation to the internet. In well served regions, the Caribbean, the Mediterranean, the US and European coasts, most of the popular ocean routes, service is excellent. In remote parts of the Pacific, the far southern latitudes, and some stretches of ocean far from any ground station, you can see slower speeds or brief gaps because the satellite overhead has no easy path back to a gateway.

Near the poles the geometry works against low earth orbit constellations, so high latitude expedition yachts still carry VSAT or Iridium as their real offshore link. Standard Roam and Priority plans are also geofenced and licensed for use only in certain areas, and taking them into international waters can result in service being cut, which is precisely why the Maritime plan exists and costs what it does. On a sailing yacht, rig obstruction is a coverage limit of its own: even in a region with perfect satellite density, the mast and sails will clip the signal periodically, so you plan for occasional micro interruptions rather than a perfect connection.

The practical takeaway is to match the plan and the hardware to the real cruising plan. A boat that never leaves the Bahamas needs nothing more than Roam and a coastal SIM. A boat crossing the Pacific to remote atolls needs Maritime, and probably a satellite messenger and possibly VSAT as backup. Selling an owner more than they need is as much a failure as selling too little, and a good installer asks about the actual itinerary before quoting anything.

Crew welfare and owner expectations

Connectivity stopped being purely a guest amenity and became a crew retention tool. Yacht crew work long seasons far from home, and the single biggest quality of life change in the last few years has been reliable internet that lets them call family, stream, study and manage their lives ashore during time off. Boats that ration data or block crew access have a harder time keeping good people, and word travels fast in the crew community about which programs treat their people well. A modern captain budgets for a crew data allowance as a genuine welfare line, not a luxury, and the router policies mentioned earlier make it easy to give crew their own network with its own allowance separate from guest and bridge traffic.

On the owner side, expectations have hardened into assumptions. An owner who spent seven figures on a boat assumes the WiFi works like home, everywhere, all the time, and does not want to hear about satellite geometry or rig shadowing. Managing that expectation is part of the installer's and the captain's job. The layered system, Starlink primary, cellular offload, VSAT or a messenger for the gaps, exists precisely so the owner never experiences the limits directly. When it is designed and installed well, the owner simply opens their laptop and it works, which is the entire point. When it is done cheaply with a single dish and no failover, the owner experiences every outage personally, and that reflects badly on everyone involved.

What it all costs in 2026

Costs split into three buckets: hardware you buy once, install labor, and the monthly service. The tables below give realistic 2026 US figures for a mid sized yacht building a proper layered system. Prices vary by region and by how much redundancy you want, but these are the numbers an installer would quote from.

For monthly service, a coastal cruiser on Roam plus a regional data SIM might spend 180 to 250 dollars a month all in. A liveaboard on Priority with dual cellular could sit around 400 to 700 dollars a month. An ocean crossing yacht on a serious Maritime plan can spend anywhere from 1,000 to 5,000 dollars a month depending on data volume, and a superyacht carrying VSAT alongside Starlink can run well past that. Compared to the old VSAT only world, where 3,000 dollars bought you a slow trickle, today's money buys genuinely fast internet, which is why the upgrade pays for itself in owner and guest satisfaction almost immediately.

A full layered install on a 50 to 80 foot yacht, done properly with a High Performance dish, a Peplink router, dual cellular, distributed WiFi and clean cabling, typically lands somewhere between 6,000 and 15,000 dollars in hardware and labor combined, before the monthly service. That is a real number, and it is why owners want an installer who does it once, does it right, and does not leave them with a corroding mount and a router nobody can configure. If you are weighing that spend against the broader cost of the boat, our guide on how much it costs to own a yacht puts connectivity in context alongside the other running expenses.

Who actually installs this: the marine electronics trade

Fitting a connectivity system touches several trades, and on a big enough boat it involves all of them. The core work belongs to marine electronics and AV IT specialists, the companies that fit navigation, entertainment and network systems. They know how to route cable through a boat, terminate connectors, configure a Peplink, and set up WiFi coverage. On yachts large enough to carry technical crew, the Electro Technical Officer, the ETO, owns the network as part of their remit and handles day to day management, troubleshooting and upgrades underway.

The install also needs an electrician's hand for the power side, because feeding a 150 watt continuous load off the DC system, sizing the wiring, and integrating with the battery and charging setup is electrical work that has to be done to standard. Getting the power right is as important as getting the dish sited right, and it is worth reading our marine electrical contractors guide if you want to understand how that side of the job should be handled. And the physical mounting, the pole, the bracket, the sealed deck penetration, benefits from someone who understands marine fabrication and bedding so it does not leak or corrode.

In practice, a good marine electronics firm coordinates all of this, or does most of it in house. What you want to avoid is the cheapest possible route, someone who bolts a residential dish to a rail with a hardware store bracket, runs the cable through a hole with no gland, and plugs it into a permanently running inverter. That install will fail, it will leak, and it will cost more to fix than doing it right the first time. For a fuller picture of how a professional handles the whole electronics fit out, our marine electronics installation guide walks through the standards a proper job follows.

Frequently asked questions

Does Starlink work in the middle of the ocean?

With the Maritime plan and a Flat High Performance dish, yes, across most ocean routes, because Maritime is licensed and prioritized for open water. There are still gaps in very remote regions far from ground stations and at high latitudes near the poles, where speeds drop or service pauses. Roam and Priority plans are not licensed for far offshore use and can be cut off in international waters, so ocean crossing boats need the Maritime plan or a VSAT backup.

How much power does a Starlink dish use on a boat?

The Flat High Performance idles around 50 to 75 watts and can spike to 150 watts or more under load or when its heater runs in cold weather. The smaller consumer flat dish averages 40 to 60 watts. Over a day an always on High Performance unit consumes roughly 1 to 2 kilowatt hours, which matters at anchor, so most boats fit a DC power kit rather than running an inverter continuously.

Can I just use my home Starlink on my boat?

You can physically connect a residential dish, but it is a poor choice. The consumer unit has moving parts, is not sealed for constant salt exposure, has a narrower scan angle, and the standard residential plan is not intended for use in motion or offshore. For a boat you want the Flat High Performance hardware on a Roam, Priority or Maritime plan, chosen to match how far from shore you actually cruise.

Do I still need cellular or VSAT if I have Starlink?

For reliability, yes. Starlink has outages, obstructions and coverage gaps, so a professional system pairs it with cellular for cheap fast coastal data and, on ocean going yachts, keeps VSAT or at least a satellite messenger as failover. A multi WAN router like a Peplink switches between them automatically so a video call survives even when one link drops. Relying on a single connection is the most common mistake owners make.

What does a full yacht internet system cost to install?

On a 50 to 80 foot yacht, a proper layered install with a High Performance dish, a Peplink router, dual cellular, distributed WiFi and clean cabling typically runs 6,000 to 15,000 dollars in hardware and labor, before monthly service. Monthly costs range from about 180 dollars for a coastal Roam plus SIM setup to several thousand for a serious Maritime plan with VSAT alongside.

Why does my Starlink keep dropping on a sailboat?

Almost always rig obstruction. Every time the mast, boom, spreaders or sails pass between the dish and the satellite it is tracking, you get a brief interruption. Mounting the dish as high and clear as practical, often on a dedicated pole or mast mount, reduces it, but some micro dropouts are unavoidable on a sailing yacht. A router with hot failover to cellular smooths over most of them so you barely notice.

Who should install marine internet, an electronics firm or an electrician?

Both trades touch it. Marine electronics and AV IT specialists handle the dish siting, router configuration, network and WiFi. An electrician sizes and installs the DC power feed so the continuous load is carried safely. On larger yachts the onboard ETO manages the system day to day. The best jobs coordinate all three so the dish is sited right, the power is right, and the mount is sealed against leaks and corrosion.

Bringing it together

Yacht WiFi has grown from an afterthought into a designed system with its own hardware, its own power budget, and its own specialist trade. Starlink for boats made fast, low latency marine internet affordable for the first time, but the boats that get it right treat Starlink as one layer in a bonded system: a Flat High Performance dish on a clean stern mount, a Peplink router bonding it with multi carrier cellular, VSAT or a satellite messenger holding the offshore gaps, and distributed WiFi so every cabin gets signal. Get the plan matched to your real cruising, get the power done properly off the DC system, and get someone who fits it right the first time, and the whole thing simply works the way owners now expect.

The people who do this work, marine electronics installers, AV IT contractors, marine electricians and ETOs, are among the most sought after in the industry right now, precisely because connectivity has become mission critical. Whether you are an owner who needs a system fitted, a captain standardizing a fleet, a contractor who wants more work, or an engineer building a career, the connection between the boat and the right person starts in the same place.