Sailboat installations

Starlink Maritime for sailboats. Masthead, spreader, or arch.

Connectivity that survives the rig. Clean cable paths, clean signal, and a dish that doesn't look bolted on.

At a glance

Sailboat install specifics.

Common mount locations	Aft arch (most common) · Spreader or mizzen · Masthead (complex, rare)
Antenna used	Starlink Flat High Performance (maritime-certified). Tolerates ~30° heel before throughput dips.
Cable path	Through existing chase or new marine-grade gland. Sealed, color-matched, hidden through bulkheads.
Power draw underway	50–75W steady-state on 12V. Inverter-fed or direct DC, sized during survey.
Typical install duration	30–38 ft: 3–5 hrs · 39–50 ft: 5–7 hrs · 51+ ft or through-mast: often split across two visits
Price range	Starts at $1,395 — see full pricing.
Rig compatibility	Sloop, cutter, ketch, yawl. Catamaran rigs handled on the cross-beam or arch.
Racing considerations	Arch or deck mount by default to minimize weight aloft. IRC/ORR placement reviewed during survey.

Where the dish goes

Three real options. One clear favorite.

On a modern cruising sailboat, the Starlink Maritime antenna has three viable homes. An aft arch is the cleanest option when the boat has one: the cable run is short and straight, the dish sits well clear of boom and mainsheet, and the obstruction profile is dominated by the rig itself — which the constellation handles gracefully. Most of our sailboat installs end up here.

A spreader or mizzen mount works on boats without an arch, especially ketches and yawls where the mizzen mast offers a clean attachment point. Cable runs longer, but signal clear of the main rig is measurably better underway. A masthead mount is technically possible and occasionally the right answer for flush-deck boats with no arch and no mizzen. It's a bigger job — weight aloft and a full through-mast cable pull — and we price it accordingly.

Cable routing

Through the mast step, not across the deck.

The thing that separates a good sailboat install from a bad one is the cable. A deck-stuffed run of exposed Starlink cable looks wrong on a sailboat and gets chafed every time the headsail flogs. We route every run through existing chases where they exist — conduit down the inside of the arch, or an unused chase in the mast step — and fit a new marine-grade gland where one doesn't. Sealant is UV-stable. Strain relief is proper. No visible cable between the dish and the cabin.

Inside the cabin, the router and POE injector live in a dry locker or nav-station cabinet. We run to your existing onboard network if you have one, or build a small mesh if you don't. Every part of this gets tested before we leave the boat.

Underway performance

Heel, rig shadow, and what it actually feels like.

The Starlink Flat High Performance antenna used on Maritime plans is a phased-array panel that electronically steers its beam. Two things affect it on a sailboat underway: heel angle and rig shadow. Throughput stays full up to roughly 30 degrees of heel; past that, the antenna is looking too close to the horizon and throughput tapers. Rig shadow — mast, shrouds, boom — causes brief dropouts as the boat swings, measured in seconds. The constellation is dense enough that these gaps are usually invisible to video calls or streaming.

Owners who cruise the Sound, the New England coast, or the Bahamas rarely notice the limits. Owners who race hard to weather on passage notice throughput dip on the leeward tack. For cruising, it's a non-issue.

Pricing

Pricing.

Installation packages start at $1,395 — see full pricing.

Installing on the Sound? Most of our sailboat work happens across Long Island Sound.

Common questions

Sailboat specifics.

Three real options on a modern cruising sailboat: (1) aft arch, which gives the cleanest cable run and the best obstruction profile underway; (2) spreader or mizzen-mounted, which works on boats with a rigid spreader base and no arch; (3) masthead, which is rare because of weight aloft and the long cable run down the mast. Most of our sailboat installs go on the arch.

Yes on both counts, but less than most owners expect. Starlink Maritime's flat high-performance antenna tolerates roughly 30 degrees of heel before throughput noticeably dips. Mast and rigging shadow can cause brief dropouts — measured in seconds — as the boat swings. The constellation is dense enough that gaps are usually invisible to a video call or stream.

For arch or spreader mounts, yes — cable is routed down an existing chase or a new marine-grade gland, sealed and color-matched, with zero visible runs in the cabin. Masthead mounts require pulling cable down the inside of the mast and through the mast step; we do this with a messenger line and marine-rated gland, but it's a bigger job and adds to the install scope.

Sailboat installations start at $1,395. See full pricing at helmmarinetech.com/#pricing. Hardware can be bring-your-own or sourced through us.

For cruising-oriented sailboats, no. For one-design or rated racing, weight aloft and windage are real concerns. We default to arch or deck mounting to keep the rig clean. If you race under IRC or ORR, we'll review placement with you during the site survey.

Next step

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