Starlink Gen 2 vs Gen 3 for Ships: Which Maritime Kit Should You Buy?

We get this question almost every week from vessel owners, fleet managers and ship chandlers across ASEAN: “Should I buy Starlink Gen 2 or Gen 3?” The short answer for most vessels today is Gen 3 — but there are good reasons some operators still run, or even choose, Gen 2 hardware. This guide explains the differences in plain terms so you can make the right call for your vessel.

First, what do “Gen 2” and “Gen 3” mean at sea?

Starlink uses “generation” for several product lines, which causes confusion. For maritime buyers, the comparison that matters is between the two Performance-class antennas built for vessels in motion:

• Gen 2 — Flat High Performance (also called Performance Gen 2): the flat, wedge-mounted dish that became the standard Starlink Maritime terminal on commercial and leisure vessels from 2023.
• Gen 3 — Starlink Performance (Gen 3): the newer, ruggedised replacement designed for harsh weather, high vibration and in-motion use.

There are also consumer Standard dishes (Gen 2 “Standard Actuated” and Gen 3 “Standard”). These are built mainly for fixed sites. They can suit a moored houseboat or a shore office, but for a vessel that is underway, we recommend a Performance-class kit.

Side-by-side comparison

Specification	Gen 2 — Flat High Performance	Gen 3 — Performance
Dimensions	575 × 511 × 41 mm	609 × 396 × 40 mm
Antenna weight	approx. 5.9 kg (up to 8.1 kg with mount)	5.2 kg
Field of view	140°	140°
Water / dust rating	IP56	IP68 unplugged, IP69K plugged in
Average power draw	110–150 W	75–100 W
Typical download speed	up to ~220 Mbps	up to 400+ Mbps
Operating temperature	—	-40°C to +60°C
Wind survivability	—	270 km/h+
Power supply	Separate PSU and router	Advanced Power Supply (AC, with DC option for off-grid and mobile), IP68
Wi-Fi router	Separate	Not built in — use your own marine router or an optional Starlink router
Cable connector	Proprietary connector	New locking push-fit connector

Figures are manufacturer and distributor published specifications. Real-world speeds depend on location, weather, network load and your service plan.

What actually changes for a vessel

1. Up to about twice the throughput

Gen 3 is rated at up to 400+ Mbps download versus roughly 220 Mbps for Flat High Performance. On a working vessel that means crew welfare Wi-Fi, video calls, ECDIS chart updates and remote monitoring can all run at the same time with less contention.

2. Lower power draw

Gen 3 averages 75–100 W against 110–150 W for Gen 2. On smaller vessels, tugs, fishing boats and yachts running off batteries or a small genset, that saving adds up over a 24-hour day.

3. Built for salt, spray and vibration

The jump from IP56 to IP68/IP69K is the biggest practical upgrade. IP69K means the unit is tested against high-pressure, high-temperature water jets — the kind of abuse a deck-mounted antenna sees from green water and wash-downs. The aluminium housing also acts as a heat sink, which helps in ASEAN heat.

4. A better connector

On Gen 2 installs, the cable connector is a common failure point on exposed decks. Gen 3’s locking connector is a real improvement. One practical note: the Gen 3 connector is larger, so plan for a bigger cable gland or deck penetration when routing the cable.

5. Bring your own router

Gen 3 outputs Ethernet to the router of your choice. For commercial vessels this is a plus: you can use a marine-grade router with bandwidth management, crew/ops network separation and failover to 4G/5G or a second satellite link.

When Gen 2 still makes sense

• You already have a working Flat High Performance install. If it is performing well and your data needs are modest, there is no urgency to rip it out. Plan the upgrade for your next dry-dock or refit.
• Fleet standardisation. If your fleet already runs Gen 2 with spares on board, adding one more Gen 2 unit (where still available) keeps spares simple.
• Budget. Remaining Gen 2 stock or refurbished units may be cheaper up front. Weigh that against higher power use and lower weather rating.

Our recommendation

For new installations on vessels that operate underway — offshore support, tugs, workboats, ferries, fishing vessels and yachts — we recommend Starlink Performance Gen 3. The ruggedness, lower power draw and higher speeds make it the better long-term choice in tropical, salt-laden conditions.

For mission-critical vessels, pair it with a backup link. Our Dual-LEO Resilience package combines Starlink as primary with OneWeb and 4G/5G as automatic failover — the most cost-effective way we know to get high-speed connectivity with real redundancy.

Frequently asked questions

Can I use my Gen 2 router with a Gen 3 antenna?

The Gen 3 Performance kit uses a different power supply and connector. Plan on using a third-party marine router or a current Starlink router with the Gen 3 kit rather than reusing Gen 2 cabling.

Does Gen 3 need a different Starlink Maritime plan?

No. The antenna generation and the service plan are separate. Both work on Starlink maritime and mobility plans, including Global Priority data for ocean coverage.

Can I install it myself?

Leisure boat owners often do. For commercial vessels, we recommend a professional install covering mounting position, cable routing, power and network setup, so the system passes inspection and doesn’t fail at sea.

Talk to Envision Data

Envision Data supplies and supports Starlink Maritime hardware, Global Priority airtime, OneWeb and GMDSS equipment for vessels across Singapore and ASEAN, backed by 20+ years in cables, telecom and satcom across the region. Tell us your vessel type, route and data needs and we’ll recommend the right kit and plan.

Request a Starlink Maritime quote →

Related reading: Starlink Gen 2 (Flat High Performance) guide · Starlink Performance Gen 3 guide