Starlink for Boats & Maritime: Complete 2026 Guide

Before Starlink, internet on a boat meant $3/minute Iridium calls, 9.6 kbps SSB email, or begging a marina for their terrible guest Wi-Fi. Maritime satellite was gated behind $20,000 VSAT installs that delivered dial-up speeds and ate 200W of continuous power. Starlink broke that model in 18 months: suddenly a weekend sailor could stream Netflix at anchor for the cost of a decent restaurant dinner per month. The problem now isn't whether to put Starlink on your boat — it's which of the three marine-capable plans actually fits, how to mount a $599 dish so it survives a decade of salt spray, and how to power it without destroying a house bank that's already stretched.

If you want a 60-second recommendation for your specific boat, our 5-question plan picker scores all five Starlink plans against your cruising profile. Otherwise, read on for the full decision framework.

The three plans for boats: Roam Regional, Roam Global, Maritime

Residential is off the table (it's address-locked to shore). Priority works for dockside businesses but isn't designed for motion. That leaves three real options for boats: Roam Regional for weekend sailors on inland and near-coastal waters, Roam Global for cruisers who cross borders or head offshore, and Maritime for commercial operations and serious blue-water transits. The pricing gaps between them are enormous, and picking the wrong tier is the single most expensive mistake in marine Starlink.

Roam Regional at $50/month pauses freely month-to-month — for a season-locked weekend sailor, that means $300 a year total. Roam Global is the sweet spot for serious cruisers at $165/month unlimited, works in most countries and most oceans up to roughly 70°N and 60°S, and is the plan 95% of full-time liveaboards actually use. Maritime is the only option that guarantees pole-to-pole reception, but at $60,000/year plus hardware it's a commercial tool, not a recreational one.

The Maritime myth: why 90% of boaters should pick Roam Global

Walk any marina and you'll find owners convinced they need Maritime because they own a boat. Starlink's marketing doesn't help — the word "maritime" implies it's the plan for boats, the same way "residential" is for houses. That's a pricing trap. Maritime exists for a small category of customer: commercial shipping running 24/7 ocean transits, research vessels, oil platforms, and crewed superyachts that operate hundreds of nautical miles offshore routinely. The plan is priced to match commercial VSAT contracts it replaced.

Roam Global, by contrast, has no coverage disadvantage until you're well offshore. The rough line where Roam Global coverage starts to thin is around 12 nautical miles from the nearest coast, but this varies wildly by region — in the Bahamas or Mediterranean you might see 40nm of stable coverage, while in the middle of the South Pacific the constellation has fewer satellites overhead and the line drops closer to 6nm. For almost every recreational use case — Caribbean chains, Mediterranean passages, US inside passages, Baltic cruising, Bahamas banks, Sea of Cortez, Great Lakes — Roam Global works the entire trip.

The real test: how often are you more than 200 nautical miles from the nearest coast? If you can count those days on your fingers per year, don't buy Maritime. If the answer is "most of the time," you're probably running a commercial operation and Maritime pays for itself. Our plan picker handles this decision automatically based on your cruising profile.

Power on a boat: battery bank, wind/solar, DC-DC direct

Boats are power-constrained in a way houses never are. A typical 40-foot cruiser has 300-600Ah of lithium house bank, topped up by 400-800W of solar and maybe a wind generator. Starlink is not a small load against that budget. A Gen 3 Standard dish at 75W average draws 1,800 Wh per day running 24/7 — roughly a third of a well-equipped cruiser's daily energy budget. Maritime's Flat High Performance dish at 180W average is nearly impossible to run full-time off a standard cruiser battery bank without a dedicated power system.

The single biggest optimization is to skip the inverter entirely and feed the dish DC directly. The factory PoE injector runs on 120V AC through an internal switcher that drops to 48V DC — two conversions, 25% loss. A third-party DC cable ($25) plus a 12V-to-48V buck-boost converter ($60) eliminates the inverter and its losses, saving roughly 15-20W continuous. On a boat that's 360-480 Wh per day back in your budget — the equivalent of 100W of added solar, for $85 in parts.

Most cruisers also run their dish on a timer or smart switch. Full 24/7 operation is a luxury; 6-8 hours of evening use covers nav downloads, weather routing, and streaming without hammering the bank. Pair that with a small wind generator ($800-1,500) for overnight trickle-charging and a 400W solar array on the bimini, and Starlink becomes a sustainable load. Our off-grid power sizer runs these numbers for your exact dish, climate and usage pattern.

Mounting: pole vs rail vs hardtop — salt exposure considerations

A boat mount has to do three things at once: give the dish a clear view of sky, survive salt and UV for a decade, and not become a wind-catching liability in a blow. Land mounts fail at all three on a boat. Here's what actually works:

Material matters more than design. Always use 316 stainless, never 304 — 304 will rust-stain your gelcoat within a season of offshore use. Aluminum is fine if anodized, but not if you have stainless rigging nearby (galvanic corrosion). Plastic mounts should be rejected out of hand for anything but a dinghy. The cable gland is the unsung hero: use a UV-rated marine gland with a dielectric grease seal, and inspect it every spring. Most marine-Starlink failures aren't the dish itself — they're water ingress through a shore-grade cable pass-through.

Coastal vs blue-water: what changes offshore

Close to shore, Starlink behaves identically to home service: 100-250 Mbps down, 20-40 Mbps up, 40-60ms latency. As you move offshore, three things change. First, the satellite footprint density drops — the constellation is optimized for populated areas, so mid-ocean cells have fewer satellites overhead at any given moment. You'll see brief dropouts of 30-90 seconds every few hours, especially during satellite handoffs when a nearby bird is rising or setting. Second, latency creeps up from 40ms to 60-90ms because your uplink now routes through a more distant ground station. Third, absolute speeds drop; expect 30-100 Mbps instead of 200+.

None of this ruins the experience — video calls still work, streaming still works, weather downloads are still fast. But your expectations need to adjust. The other change offshore is the sky view: the dish needs clear sky above about 20° elevation, and sailboats heeled hard on a tack can partially shadow the dish with the boom or rigging. A good mount anticipates this — stern-pole mounts on starboard side shadow less on a typical port-tack beat, and arch mounts above the bimini are nearly immune. Our obstruction calculator helps you sanity-check a proposed mount before drilling holes.

Real-world cruiser setups

32ft sailboat — weekend coastal

Profile: retired couple, Catalina 320, weekends on the Chesapeake plus two 2-week summer cruises. Stern-rail pole mount with the dish 8ft above deck, Gen 3 Standard. Plan: Roam Regional at $50/month, paused 5 months a year, total $350/year. Power: 200Ah LiFePO₄ bank plus 200W flexible solar on the bimini, dish runs 4-6 hours an evening at anchor. Total all-in: $349 hardware + $200 pole mount + $85 DC kit = $634 setup. Service averages 180 Mbps down at the dock, 120 Mbps at typical anchorages in the Bay.

45ft catamaran — liveaboard Caribbean

Profile: liveaboard family of 4, Leopard 45, full-time cruising between Florida, Bahamas, Windwards. Hardtop bracket between the solar arches, Gen 3 Standard. Plan: Roam Global at $165/month unlimited — unavoidable because they cross international borders monthly. Power: 600Ah LiFePO₄ bank, 1kW of rigid solar on the hardtop, small 400W wind generator. Dish on 16-18 hours a day for the kids' schooling and parents' remote work. Total setup: $599 dish + $350 hardtop bracket + $85 DC kit = $1,034. Sustained 200 Mbps throughout the Caribbean chain including offshore passages.

60ft motor yacht — blue-water transits

Profile: retired owner plus captain, Nordhavn 60, long-range passages including Hawaii, French Polynesia, Alaska. Arch-mounted Flat High Performance dish, plus a second Gen 3 Standard on the flybridge as backup. Plan: Roam Global at $165/month — owner evaluated Maritime and concluded that even on passages to Hawaii, Roam Global maintained usable coverage 90% of the time. Power: 1,200Ah LiFePO₄ bank, 10kW gen-set for long passages, both dishes on full-time. Hardware cost: $1,200 dish + $500 arch modification + professional install = $2,800. Savings over Maritime: $58,000/year.

Redundancy: backup satellite phone, cellular, SSB

Starlink is reliable, but not single-point-of-failure reliable when you're 500 miles offshore. Every serious cruising boat should have at least one backup communication channel. The modern stack looks like this: cellular as the cheap primary near shore (a dual-SIM router with US and international eSIMs costs $400 and handles 80% of coastal cruising for free), Starlink Roam Global as the main offshore pipe for bandwidth-heavy needs, and Garmin inReach or Iridium GO ($400 hardware, $65/month) as the deep-offshore emergency backup for text, weather and SOS. SSB radio has mostly faded from new installs, but remains useful for the small cruising community that still runs Pactor email nets.

The right stack depends on how you cruise. Coastal weekenders get away with cellular + Starlink. Caribbean liveaboards need Starlink + inReach. Pacific crossers want all three layers plus a dedicated EPIRB. Remember that Starlink itself can fail — a bad cable, a water-ingress event, a software issue — and your emergency comms must not share any hardware or software with it. Our full satellite comparison tool evaluates Starlink against Iridium, Inmarsat and VSAT alternatives so you can build the right redundancy budget.

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