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Connectivity at Sea in 2026: What It Costs, and What You Can Actually Buy Yourself

Updated 16 August 2026 · connectivity, satellite, starlink, crew-life

Connectivity at Sea in 2026: What It Costs, and What You Can Actually Buy Yourself

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Connectivity at sea is sold to you as a monthly number, and that number hides almost everything you need to decide. Starlink's own maritime page listed Global Priority at 500 GB for $250 a month, 1 TB for $650 and 2 TB for $1,150 when it was last updated on 10 August 2026. A third-party guide published in 2026 listed a completely different ladder for the same service, starting at 25 GB for $150 and running to 1 TB for $1,200. Both cannot be right. That gap is the real story of buying connectivity at sea, and it is why the first thing this article tells you is to check the live checkout before you commit to anything.

I work as a marine engineer. What follows is what the published figures actually say, where they contradict each other, and which service belongs on which vessel. Prices below carry the date they were published. Re-check every one of them before you spend money.

One thing worth saying before the numbers: if you're crew rather than the person signing the satellite contract, none of the plans below are yours to buy, and no amount of reading changes that. The connectivity you can actually purchase yourself, today, on your own card, is a personal eSIM for port and coastal data. That's a separate, much smaller decision, and it's covered in full in our best eSIM for seafarers guide; Airalo is the one I install before every port call because it activates the moment a local tower is in range. The rest of this article is about the ship's satellite bill, which is a different budget entirely.

What connectivity at sea actually means in 2026

For a vessel beyond territorial waters, connectivity at sea means satellite service, and in 2026 the search results are dominated by three names: Starlink Maritime, Iridium Certus, and Inmarsat FleetBroadband. They are not competing for the same job. Starlink sells broadband in large data buckets. Iridium Certus sells small data allowances at high per-megabyte rates. Inmarsat FleetBroadband, from the rate-sheet material available, is metered per megabyte rather than sold in broadband-sized chunks.

The practical split follows from the size of the bucket. If a service includes 600 MB across a whole year, nobody is streaming on it. If a service includes 1 TB a month, the ship is running normal internet.

One more thing sits underneath all of this. A guide published in 2026 states that standard residential Starlink plans do not work offshore beyond territorial waters, and defines coastal service as extending 12 nautical miles from shore. The same guide says Roam and Maritime plans are the intended options past that line. It is a secondary source, so treat the enforcement details as unconfirmed, but the shape of the rule is consistent everywhere: the cheap home plan is not the offshore plan.

Starlink Maritime: the published numbers, and why they disagree

Starlink's own maritime page is the strongest source available, and it is worth reading it as the baseline that everything else has to beat.

As of the page's last update on 10 August 2026, Starlink Business Maritime listed Global Priority at three tiers. The 500 GB tier at $250 a month is described on the page as best for small businesses with below-average bandwidth needs, roughly 2 to 4 users. The 1 TB tier at $650 a month is pitched at 5 to 10 users. The 2 TB tier at $1,150 a month is pitched at 10 to 20 users. Those user counts are Starlink's own sizing guidance, so read them as marketing rather than as a measured benchmark. Nobody independent tested them.

Now the contradictions.

A reseller page dated 12 February 2026 says Starlink Maritime starts at $377 a month with a $3,000 one-time hardware fee. That is a reseller quote and it does not match Starlink's own list.

A separate 2026 guide gives a different ladder again: Regional Roam at around $50 a month for single-continent coastal use with no priority data, Global Roam at around $165 a month covering 50-plus countries and international waters, also with no priority data, then Mobile Priority 50 GB at $250 a month and Mobile Priority 1 TB at $500 or more with global and open-ocean coverage on metered priority data.

A third 2026 guide lists yet another set: 25 GB for $150, 50 GB for $245, 100 GB for $340, 150 GB for $434, 200 GB for $472, 250 GB for $528, 300 GB for $600, 500 GB for $700 and 1 TB for $1,200.

Four sources, four price structures, one service. The differences might be regional pricing, reseller packaging, taxes, or guides that went stale. The available research does not confirm which. So the honest position is that the exact current price of connectivity at sea from Starlink is unknown until you open the live checkout or read the contract in front of you. Anyone who quotes you a single confident figure, including any article, is quoting a snapshot.

The one capability claim worth carrying forward: a 2026 article states that Global Priority plans are not throttled during congestion the way residential plans can be. That comes from a guide rather than Starlink's own policy page, so it is a claim, not a guarantee. Another guide says Starlink Maritime can reach up to 220 Mbps download at sea, which is again a reseller-side figure with no primary benchmark behind it.

Iridium Certus: small buckets, hard ceilings

Iridium Certus is priced like a communications service rather than a broadband service, and the numbers make that obvious immediately.

One reseller lists maritime plans running from $112 a month with 0 MB included, up to $2,250 a month with 10 GB included. Overage on the same rate sheet runs from $14.10 per megabyte on the smallest tier down to $0.50 per megabyte at the largest. The annual plans on that reseller's list tell the same story: 600 MB a year for $4,500, 1.2 GB a year for $8,550, 3 GB a year for $12,400, 12 GB a year for $18,250, and 60 GB a year for $22,600.

Sit with the first annual figure for a second. $4,500 buys 600 MB across twelve months. That is roughly the size of one film trailer folder, spread over a year, for the price of a decent secondhand car.

These figures come from a reseller rather than Iridium's own consumer-facing page, so the live pricing is unconfirmed. The structure still tells you what the service is for. At $14.10 per megabyte on the smallest tier, a single accidental phone backup would cost more than the monthly plan. Nothing in the gathered research states an official technical ceiling for heavy browsing or video, but the arithmetic on those overage rates makes the practical answer plain enough.

Inmarsat FleetBroadband: metered, and thinly documented

Inmarsat FleetBroadband, in the material available, is metered per megabyte rather than sold in large monthly buckets. One reseller lists a 300 MB FleetBroadband-style plan at $26.33 per megabyte, and the snippet gives no wider plan structure. A separate Inmarsat Fleet BB result is a PDF rate sheet that does not expose enough detail to state current prices, caps or speed classes.

That is genuinely all the sourced material supports. The current plan lineup, the usage rules and the speed classes are not established by anything I can point to, so I am not going to fill the gap with an estimate. If FleetBroadband is on your shortlist, the rate sheet from your own provider is the only document that counts.

Connectivity at sea compared: the sourced figures side by side

Service Published price Included data What it is built for Caveat on the number
Starlink Global Priority 500 GB $250/month, Starlink maritime page, updated 10 Aug 2026 500 GB Vendor sizing: 2 to 4 users Other 2026 sources list different tiers entirely
Starlink Global Priority 1 TB $650/month, same page and date 1 TB Vendor sizing: 5 to 10 users Vendor's own user counts, no independent test
Starlink Global Priority 2 TB $1,150/month, same page and date 2 TB Vendor sizing: 10 to 20 users Same source, same limitation
Starlink Maritime, reseller quote From $377/month plus $3,000 hardware, reseller page dated 12 Feb 2026 Not stated in the snippet Vessel broadband Reseller packaging, does not match Starlink's list
Starlink Global Roam Around $165/month, 2026 guide No priority data 50-plus countries and international waters Secondary source, deprioritised traffic
Starlink Regional Roam Around $50/month, 2026 guide No priority data Single-continent coastal Secondary source, coastal only
Iridium Certus, entry tier $112/month, reseller list 0 MB Low-bandwidth comms Overage at $14.10/MB
Iridium Certus, top monthly tier $2,250/month, reseller list 10 GB Heavier comms use Overage at $0.50/MB
Iridium Certus, 60 GB annual $22,600/year, reseller list 60 GB per year Annual comms budget Reseller figure, not operator page
Inmarsat FleetBroadband, 300 MB plan $26.33/MB, reseller list 300 MB Metered maritime data Wider plan structure not documented in the source

Every figure in that table needs re-checking against a live quote before you sign anything. Where a source is a reseller or a guide, that is stated, because it changes how much weight the number deserves.

For a rough sanity check on the whole category, one 2026 comparison guide puts monthly cost per vessel at EUR 50 to 500 for 4G data plans, EUR 250 to 2,500-plus for Starlink, and EUR 500 to 5,000-plus for other satellite options. It is a broad secondary-market range rather than a benchmark, but it lands in the same territory as the specific numbers above.

The honest downsides nobody puts in the brochure

There are three real problems with connectivity at sea as it is sold in 2026, and none of them show up on a pricing page.

The published prices do not agree with each other. Four sources gave four different Starlink structures for the same service in the same year. That is not a small variance. It means your budget planning is built on a number you cannot verify from the outside, and it means any article promising you the definitive 2026 price list is either lucky or guessing.

Metered satellite data is brutally expensive at the low end. The $14.10 per megabyte figure on Iridium's smallest tier is not a typo. On that plan, the difference between a disciplined crew and a careless one is measured in thousands. There is no soft landing when someone leaves cloud photo sync running.

Roaming-class plans get deprioritised. Both Starlink Roam tiers, Regional and Global, are listed with no priority data. Deprioritised traffic during congestion is exactly the failure you feel at the worst moment, on a video call home on a Sunday night when everyone else is doing the same thing. The priority tiers cost several times more for a reason.

There is a fourth issue worth naming, though it cuts differently. The research available carries no user reviews, no forum complaints and no support-ticket data for any of these services. Real-world failure evidence is missing from the public record I can verify, which means the day-to-day reliability picture is thinner than the pricing picture. Ask other crews on your trade route. Their experience is better evidence than any of these pages.

Who should not buy this

Skip maritime satellite entirely if your vessel does short coastal runs inside 12 nautical miles and sits alongside often. The 2026 guide that defines coastal service at 12 nautical miles from shore also points to Roam-class plans as the offshore answer, which tells you the expensive tier is aimed past that line. If you are rarely past it, a mobile data strategy will serve you better and cost a fraction. Our guide to the best eSIM for seafarers between port calls covers that route properly, and Airalo is the one I install before a coastal run because the profile activates the moment a local tower is in range, no port SIM shop required.

Skip Iridium Certus if you expect anything resembling normal internet. A plan with 600 MB across a year at $4,500 is a communications lifeline with a data side-channel. It is the wrong tool for crew welfare browsing, and buying it for that will produce an overage bill nobody wants to explain.

Skip the Roam tiers if the connection has to work during peak hours. No priority data means what it says. If your business depends on a call connecting at 20:00 ship time, the Roam saving is false economy.

And if you are crew rather than the person signing the contract, none of these plans are yours to buy. Your problem is making the ship's existing pipe work harder, which is a different skill set. The fixes for slow crew WiFi are the practical starting point there, and our best VPN for cruise ship crew covers protecting your own traffic on a connection you do not control.

How to actually choose

Start with the number of people and what they are doing, because that is the only variable that reliably maps to a tier.

Starlink's own sizing on its 10 August 2026 page puts 2 to 4 users on 500 GB, 5 to 10 users on 1 TB and 10 to 20 users on 2 TB. Those are vendor estimates and they assume ordinary use, not a crew of twenty streaming in the evening. Treat them as a floor rather than a ceiling.

Then decide whether the connection is operational or welfare. Operational traffic, weather routing, reporting, email with the office, survives fine on small buckets and can justify an Iridium-class plan. Welfare traffic, which means video calls and streaming, needs broadband-class data or it becomes an overage problem.

Finally, get the quote in writing with the date on it. Every source in this article disagrees with at least one other source. Your provider's current rate sheet, dated, is worth more than all of them combined.

Whatever tier you land on, none of these services make your traffic private by default, and a shared ship network is not a private one. If banking or company logins ride over the connection, our tested VPN setups that work with Starlink Maritime cover which protocol survives the link without killing your throughput.

FAQ

How much does connectivity at sea cost per month in 2026?

The published figures range widely and do not agree with each other. Starlink's own maritime page, updated 10 August 2026, listed Global Priority at $250 for 500 GB, $650 for 1 TB and $1,150 for 2 TB per month. A reseller page dated 12 February 2026 quoted from $377 a month plus $3,000 for hardware, and other 2026 guides list different ladders again. Check the live checkout before budgeting.

Does regular Starlink work offshore?

According to a 2026 guide, standard residential plans do not work offshore beyond territorial waters, and that guide defines coastal service as extending 12 nautical miles from shore. The same source points to Roam and Maritime plans as the intended options past that boundary. It is a secondary source, so confirm the current policy with Starlink directly before relying on it.

Why is Iridium Certus so much more expensive per gigabyte?

Iridium Certus is priced as a low-bandwidth communications service rather than broadband. A reseller list shows plans from $112 a month with 0 MB included up to $2,250 a month with 10 GB, and overage from $14.10 per megabyte down to $0.50 per megabyte at the top tiers. Those allowances are designed for messaging and operational traffic, not for streaming.

What is the difference between Starlink Roam and Starlink Maritime?

A 2026 guide describes Regional Roam at roughly $50 a month for single-continent coastal use and Global Roam at roughly $165 a month covering 50-plus countries and international waters, both with no priority data. Mobile Priority plans in the same guide start at $250 a month for 50 GB with global and open-ocean coverage on metered priority data. The core difference is whether your traffic gets priority when the network is busy.

Are the speeds advertised for maritime satellite reliable?

One 2026 guide claims Starlink Maritime can reach up to 220 Mbps download at sea, but that figure comes from a guide rather than an operator benchmark. No independent throughput test, latency guarantee or service-level agreement appears in the material I could verify. Treat advertised peak speeds as a best case rather than a planning number.

Verdict

The pricing published for connectivity at sea in 2026 is inconsistent enough that the only responsible advice is to verify before you buy. Starlink's own page gives the clearest baseline, three Global Priority tiers at $250, $650 and $1,150 a month as of 10 August 2026, and the vendor's own sizing puts them at 2 to 4, 5 to 10 and 10 to 20 users. Iridium Certus and Inmarsat FleetBroadband occupy a different job entirely, with small metered allowances that punish casual use. Match the tier to the headcount, decide whether you are buying operational comms or crew welfare, and get a dated quote in writing, because connectivity at sea is one of the few purchases where the published price and the price you actually pay routinely differ.

If you're reading this as a crew member rather than a buyer of the ship's plan, the actionable move is smaller and cheaper: sort out your own port and coastal data with a personal eSIM before you fly out to join. See the best eSIM for seafarers for the full comparison, or go straight to Airalo if you already know your next few ports.

About the author

I am a working marine engineer and I have spent my career on vessels where the internet either works or the whole watch hears about it. This article deliberately reports only what the published sources say, with the publisher and the date attached to every figure, because the alternative on this topic is confident invention. Where the sources contradicted each other, I said so instead of picking a winner. Where the sources were silent, on Inmarsat's current plan structure, on real-world reliability data, I left the gap visible rather than filling it.

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