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 indispensable as a backup.
- 2026 offshore combo: Starlink Mini as primary throughput + Iridium GO!exec as backup safety. Covers all possible situations. Budget ~ 1,500-2,500 € VAT-excluded hardware + 150-300 €/month combined subscription.
- Skysat distributes Scanstrut installation hardware for Starlink Mini (multi-mast mount, deck pass-through, cable waterproof gland).
- Workshop verdict: Mediterranean + temperate Atlantic → Starlink alone (~ 50 €/month). Transatlantic + Caribbean → Starlink + Iridium backup (~ 200 €/month). Around-the-world + 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 in 2026 the Mini: a flat antenna kit 30×25 cm, perfect for sailboats. But Iridium retains a strategic advantage in extreme zones and 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 — 780 km polar LEO constellation
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 the beginning, modest throughput (kbps), but maritime safety service SafetyCast standard since 2025.
Starlink — 550 km LEO constellation
~ 5,000 satellites in 2026, 550 km low orbit. 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.
- Hardware price: ~ 950-1,200 € VAT-excluded.
- Subscription: ~ 130-180 €/month (depending on data volume).
Starlink Mini — technical details
The Mini is the compact format launched in 2024 for mobility (sailboat, campervan). Flat 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.
- Hardware price: ~ 500-600 € VAT-excluded (depending on Starlink promo).
- Subscription: ~ 50 €/month "Mobile Roam" plan (unlimited mobile data), ~ 250-400 €/month "Mobile Priority" plan (priority throughput).
2026 geographic coverage
The decisive criterion:
- Mediterranean: Starlink excellent (full coverage, max throughput), Iridium only as 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 indispensable.
- Cape Horn / Patagonia: Starlink covers Antarctica in 2025-2027 deployment. Iridium remains indispensable for safety.
- Around-the-world cruising: Iridium primary, Starlink as comfort complement.
Technical comparison table
| Criteria | Iridium GO!exec | Starlink Mini |
|---|---|---|
| Hardware price VAT-excluded | ~ 950-1,200 € | ~ 500-600 € |
| Standard subscription | ~ 130-180 €/month | ~ 50 €/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 €/month). Covers all waters frequented by European pleasure sailors with throughput for streaming and VoIP. Total budget ~ 600 €/year hardware amortized over 5 years + 600 €/year subscription.
Transatlantic round trip (10-15% of sailors)
Combo Starlink + Iridium GO!exec. Starlink 95% of the time (~ 50 €/month). Iridium as safety backup + marginal coverage zones (~ 150 €/month). Combined budget ~ 200 €/month while sailing, possibility to suspend Iridium off-season.
Around-the-world + polar zones
Iridium GO!exec primary + Starlink Mini when possible. Iridium safety always operational. Hardware budget excluding subscription ~ 1,800 € VAT-excluded total.
Starlink installation — Scanstrut mounts
Skysat distributes Scanstrut mounts for clean Starlink integration:
- PowerTower aluminium mount: stainless telescopic mast for Starlink mount at height (optimal sky visibility). ~ 280-350 € VAT-excluded.
- PTM-R2 multi-mount mast: rear mast mount for Starlink + VHF + additional antennas. ~ 450 € VAT-excluded.
- Starlink-compatible deck pass-through: watertight deck penetration for Starlink cable (30 mm). ~ 95 € VAT-excluded.
- Horizontal Cable Seal: watertight gland for horizontal cable pass-through. ~ 35 € VAT-excluded.
FAQ — Practical satellite for sailboats
Starlink while underway — does it work?
Yes perfectly with the "Mobile Roam" plan. The antenna auto-points at satellites while underway. 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 when unused at anchor.
Is Iridium GO!exec useful in the Mediterranean?
Limited. Starlink covers 100% of the Mediterranean. Iridium is justified only as a safety backup (Starlink failure, antenna issue) — for most Mediterranean sailors, Starlink alone is sufficient.
Can I suspend Starlink subscription off-season?
Yes, the "Mobile Roam" plan is suspendable monthly via app/dashboard with no fees. Practical to pay only during sailing months.
Satellite safety — Iridium SafetyCast vs Starlink?
Iridium integrates SafetyCast since 2025 (global maritime alerts NAVAREA, MSI). Maritime industry standard. Starlink does not offer an equivalent — it is standard internet, not a dedicated maritime service.
3 real-world workshop cases — offshore connectivity
Case 1 — Sun Odyssey 410 transatlantic 2025
Setup: Starlink Mini (~ 540 € VAT-excluded hardware + 50 €/month "Mobile Roam" subscription) + Iridium GO!exec (~ 1,050 € VAT-excluded hardware + 130 €/month subscription) as safety backup. Scanstrut PowerTower mount installed at rear mast. Crossing validation: Starlink operational 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 safety."
Case 2 — Mediterranean seasonal sailboat
Starlink Mini alone (~ 540 € VAT-excluded hardware + 50 €/month). No Iridium needed as the Mediterranean is 100% covered by Starlink. Customer suspends subscription from November to March (saving ~ 250 €/year). Total hardware install ~ 750 € VAT-excluded.
Case 3 — Class40 preparing Route du Rhum
Combo Iridium GO!exec (safety priority for racing) + Starlink Mini (comfort data). Iridium enables Predict Wind GRIB and SafetyCast. Starlink enables team email + video calls with sponsors during stops. Total hardware ~ 1,800 € VAT-excluded.
Excluded alternatives — non-retained solutions
- Iridium Pilot (traditional pre-Starlink system): hardware 2,500-4,000 € VAT-excluded + subscription 200-400 €/month. Performance equivalent to Iridium GO!exec in throughput. Relevant only for commercial units already 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 hardware cost.
- 4G/5G coastal only: 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 mount at 1.5-2 m above deck. Avoid cockpit shadow + rigging.
- Watertight cable: Scanstrut Horizontal Cable Seal for deck pass-through (~ 35 € VAT-excluded). Do not drill without specific waterproofing.
- Power: 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 mounts for Starlink. Iridium and Starlink hardware sold direct from manufacturer — Skysat advises and installs. 2026 VAT-excluded prices are indicative.
