The essentials in 30 seconds
- Starlink Mini = 2026 standard for latitudes ≤ 60° N/S. Throughput 50-150 Mbps, smartphone app, latency 30-50 ms. Covers 95% of European pleasure sailing routes (Atlantic, Mediterranean, Caribbean).
- Iridium = 100% global coverage. Including poles, northern North Sea, Antarctica. Limited throughput (88-512 kbps), ideal for voice and emergency messaging. For North Atlantic crossings and Cape Horn, Iridium remains essential as a complement.
- 2026 offshore combo: Starlink Mini as primary throughput + Iridium GO!exec as backup security. Covers all possible situations. Budget ~ $1,500-2,500 USD material + $150-300 USD/month combined subscription.
- Skysat distributes Scanstrut installation hardware for Starlink Mini (multi-mast support, deck pass-through, cable waterproof gland).
- Workshop verdict: Mediterranean + temperate Atlantic → Starlink alone (~ $50 USD/month). Transatlantic + Caribbean → Starlink + Iridium backup (~ $200 USD/month). Around-the-world trip + polar zones → Iridium primary + Starlink when possible.
2026 marks the end of Iridium’s monopoly on sailboat satellite connectivity. Starlink deployed its low-orbit constellation in 2021-2024 and offers the Mini in 2026: a flat-panel antenna kit measuring 30×25 cm, ideal for sailboats. But Iridium retains a strategic advantage in extreme zones and for safety.
This article distinguishes the two ecosystems by navigation program. For Starlink installation (already drafted in June), see Starlink Mini sailboat installation.
The two technologies — Iridium vs Starlink
Iridium — polar LEO constellation at 780 km
66 low-orbit polar satellites (780 km altitude), operational since 1998 (Iridium 1), modernized 2017-2023 (Iridium NEXT). 100% global coverage, including poles. Voice and data service since inception, modest throughput (kbps), but maritime safety service SafetyCast standard since 2025.
Starlink — LEO constellation at 550 km
~5,000 satellites in 2026, low-orbit at 550 km. Symmetrical throughput 100-300 Mbps up/down. Coverage between 70° N and 70° S latitude (polar constellation in progressive deployment). No dedicated voice service, but VoIP via smartphone app works perfectly.
Iridium GO!exec — technical details
The Iridium GO!exec is the 2026 offshore terminal standard, successor to the GO!. Compact format, 12 V, integrated antenna.
- Throughput: 88 kbps download, 22 kbps upload (modest but reliable).
- Coverage: 100% global, including poles.
- Services: unlimited voice, SMS, restricted data (email + light web), WhatsApp/iMessage compatible.
- Safety: integrated SOS button, internal GPS, satellite EPIRB alert.
- Material price: ~ $950-1,200 USD HT.
- Subscription: ~ $130-180 USD/month (depending on data volume).
Starlink Mini — technical details
The Mini is the compact format launched in 2024 for mobility (sailboat, campervan). Flat-panel antenna 30×25 cm, 1.1 kg.
- Throughput: 50-150 Mbps download, 10-30 Mbps upload depending on zone and time.
- Coverage: 70° N to 70° S latitude. Not in northern North Sea, Antarctica, northern Siberia.
- Services: unlimited internet, voice via VoIP (WhatsApp, FaceTime), video streaming possible.
- Safety: no dedicated SOS — operates like standard internet.
- Material price: ~ $500-600 USD HT (depends on Starlink promotion).
- Subscription: ~ $50 USD/month "Mobile Roam" plan (unlimited mobile data), ~ $250-400 USD/month "Mobile Priority" plan (priority throughput).
2026 geographic coverage
The decisive criterion:
- Mediterranean: Starlink excellent (full coverage, max throughput), Iridium as sole backup.
- North Atlantic (westbound crossing): Starlink covers up to 60° N (so Azores + Bermuda), Iridium beyond.
- Caribbean: Starlink excellent, Iridium as backup.
- North Sea, Norway, Iceland: Starlink cuts off at 70° N (Tromsø, Reykjavik OK; Spitzbergen no). Iridium essential.
- Cape Horn / Patagonia: Starlink covers Antarctica in 2025-2027 deployment. Iridium remains essential for safety.
- Around-the-world cruising: Iridium primary, Starlink as comfort complement.
Technical comparison table
| Criteria | Iridium GO!exec | Starlink Mini |
|---|---|---|
| Material price HT | ~ $950-1,200 USD | ~ $500-600 USD |
| Standard subscription | ~ $130-180 USD/month | ~ $50 USD/month Mobile Roam |
| Download throughput | 88 kbps | 50-150 Mbps |
| Upload throughput | 22 kbps | 10-30 Mbps |
| Coverage | 100% global (poles included) | 70° N to 70° S |
| Voice | Native (unlimited) | VoIP via app |
| Dedicated SOS | Yes, integrated | No |
| Video streaming | No (too slow) | Yes (HD) |
| Antenna format | Integrated 18×18 cm | Flat 30×25 cm |
| Power consumption | 10-15 W max | 25-50 W max |
Workshop verdict by program
Mediterranean + temperate Atlantic (95% of French pleasure sailors)
Starlink Mini alone (~ $50 USD/month). Covers all waters commonly sailed by European pleasure boaters with throughput for streaming and VoIP. Total budget ~ $600 USD/year material amortized over 5 years + $600 USD/year subscription.
One-way transatlantic (10-15% of sailors)
Combo Starlink + Iridium GO!exec. Starlink 95% of the time (~ $50 USD/month). Iridium as backup security + marginal coverage zones (~ $150 USD/month). Combined budget ~ $200 USD/month while sailing, possibility to suspend Iridium off-season.
Around-the-world + polar zones
Iridium GO!exec primary + Starlink Mini when possible. Iridium security always operational. Budget excluding subscription ~ $1,800 USD HT total material.
Starlink installation — Scanstrut supports
Skysat distributes Scanstrut supports for clean Starlink integration:
- PowerTower aluminum support: stainless telescopic mast for Starlink mounting at height (optimal sky visibility). ~ $280-350 USD HT.
- PTM-R2 multi-mast: rear mast for Starlink + VHF + additional antennas. ~ $450 USD HT.
- Deck pass-through compatible with Starlink: watertight deck penetration for Starlink cable (30 mm). ~ $95 USD HT.
- Horizontal Cable Seal: watertight gland for horizontal cable pass-through. ~ $35 USD HT.
FAQ — Practical satellite for sailboats
Starlink in motion — does it work?
Yes perfectly with the "Mobile Roam" plan. The antenna automatically points at satellites while moving. No connection pause during heel or moderate roll (≤ 30°).
Starlink power consumption over 24 h?
25-50 W active = ~50-100 Ah/24 h. Significant on the energy budget. Plan for dedicated DC-DC + ON/OFF switch to power off at night or in unused anchorage.
Is Iridium GO!exec useful in the Mediterranean?
Limited. Starlink covers 100% of the Mediterranean. Iridium is justified only as a backup security (Starlink failure, antenna issue) — for the average Mediterranean sailor, Starlink alone is sufficient.
Can I suspend my Starlink subscription off-season?
Yes, the "Mobile Roam" plan is suspendable monthly via app/dashboard with no fees. Practical to pay only for months sailed.
Satellite safety — Iridium SafetyCast vs Starlink?
Iridium has integrated SafetyCast since 2025 (global maritime alerts NAVAREA, MSI). Maritime industry standard. Starlink does not offer an equivalent — it is internet, not a dedicated maritime service.
3 real-world workshop cases — offshore connectivity
Case 1 — Sun Odyssey 410 2025 North Atlantic crossing
Setup: Starlink Mini (~ $540 USD HT material + $50 USD/month Mobile Roam subscription) + Iridium GO!exec (~ $1,050 USD HT + $130 USD/month subscription) as backup security. Scanstrut PowerTower installation on rear mast. Crossing validation: Starlink operational for 18 days / 21 (zone 70° N → 25° N), Iridium used 3 days at coverage edge. Skipper confirms: "The combo is unbeatable. Starlink for comfort, Iridium for security."
Case 2 — Seasonal Mediterranean sailboat
Starlink Mini alone (~ $540 USD HT + $50 USD/month). No Iridium needed as the Mediterranean is 100% under Starlink coverage. The customer suspends the subscription from November to March (saving ~ $250 USD/year). Total material install ~ $750 USD HT.
Case 3 — Class40 Route du Rhum preparation
Combo Iridium GO!exec (priority for race safety) + Starlink Mini (comfort data). Iridium enables GRIB Predict Wind and SafetyCast. Starlink enables team email + sponsor videoconference during stops. Total material ~ $1,800 USD HT.
Excluded alternatives — solutions not retained
- Iridium Pilot (traditional pre-Starlink system): material $2,500-4,000 USD HT + subscription $200-400 USD/month. Equivalent performance to Iridium GO!exec in throughput. Relevant only for commercial units historically equipped.
- Inmarsat Fleet: oriented toward commercial maritime, rarely used in pleasure boating. Covers same zones as Iridium but with similar throughput and 2× higher material cost.
- Coastal 4G/5G alone: attempts to replace satellite in coastal cruising. Limit: cut-off beyond 5-15 NM from shore, and high cost in international roaming (Italy, Spain, Croatia). Nonsense for safety.
- Old Iridium hardware without data plan: Iridium Extreme (Iridium smartphone) included in some boat safety kits. Voice only, no data, not suited for modern offshore internet use.
Practical Starlink Mini installation on sailboats
Best practices for Starlink Mini installation — Skysat workshop
- Antenna position: rear mast or support at height 1.5-2 m above deck. Avoid cockpit shadow + rigging.
- Watertight cable: Scanstrut horizontal Cable Seal for deck pass-through (~ $35 USD HT). Do not drill without specific waterproofing.
- Power supply: Starlink Mini consumes 25-50 W. 12 V cable from lithium bank via DC-DC (recommended to stabilize voltage), accessible ON/OFF switch.
- Configuration: enable "Mobile" mode in Starlink app — not "Stationary" mode which assumes a fixed antenna on land.
- Pre-departure test: measure throughput at marina (test.starlink.com) — verify 50+ Mbps download. If < 30 Mbps, check antenna orientation and obstructions.
Skysat distributes Scanstrut supports for Starlink. Iridium and Starlink hardware is sold direct from the manufacturer — Skysat advises and installs. 2026 HT prices are indicative.
