In an era of Starlink and OneWeb, Inmarsat’s L-band services still earn their place on Singapore vessels — as the reliable, always-on backup that keeps working when a flat panel is obstructed, iced, or out of coverage. Two Inmarsat products come up repeatedly for smaller and mid-size vessels: Fleet One and FleetBroadband. They look similar on a brochure but are built for different vessels. This guide explains the difference and which fits yours.
What they have in common
Both run on Inmarsat’s L-band geostationary network, both deliver simultaneous voice and IP data, and both are far more weather-resilient than higher-frequency VSAT or the flat-panel LEO systems. L-band’s strength is dependability: small antenna, rides through rain and heavy seas, and stays locked when other systems drop. That is exactly why owners keep it as a backup even after moving broadband to Starlink.
Inmarsat Fleet One — the entry-level workhorse
Fleet One is designed for fishing vessels, leisure craft, and small commercial boats that need reliable voice and modest data without a big install. It uses a compact antenna, is simple to fit, and is priced for owner-operators. Data throughput is modest — enough for email, weather, messaging, position reporting, and voice calls — but not for crew streaming or heavy operational data.
Inmarsat FleetBroadband — the commercial standard
FleetBroadband (FBB) is the established commercial-vessel service, available in three terminal classes with progressively larger antennas and higher throughput. It supports higher data rates, multiple simultaneous voice lines, and the reliability that charterers and flag states expect. It is the natural L-band choice for OSVs, tugs, tankers, and any vessel where comms are operationally critical.
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Side-by-side
| Attribute | Fleet One | FleetBroadband (FB150 / FB250 / FB500) |
|---|---|---|
| Target vessel | Fishing, leisure, small commercial | Commercial: OSV, tug, tanker, bulker |
| Antenna size | Compact (~25 cm) | Small to medium (~25-60 cm by class) |
| Typical data | Up to ~100 kbps | ~150 / 284 / 432 kbps by class |
| Voice lines | Single | Single to multiple |
| Best use | Email, weather, messaging, voice | Ops data, multi-user voice, reliable backup |
| Indicative hardware (SGD) | 2,500 – 4,500 | 6,000 – 18,000 by class |
Hardware and airtime are quote-only in Singapore; figures above are indicative and depend on terminal class, antenna, and airtime bundle.
How to choose
- Choose Fleet One if you run a fishing vessel, yacht, or small commercial craft, want dependable voice plus light data, and are price-sensitive.
- Choose FleetBroadband if you run a commercial vessel where comms are operationally critical, need multiple voice lines or higher data, or need a robust L-band layer behind a Starlink/OneWeb primary.
The modern setup: L-band as the reliable backup
For most Singapore operators in 2026, the smart architecture is a LEO primary (Starlink, often bonded with OneWeb) for cheap, fast bandwidth, with an Inmarsat Fleet One or FleetBroadband terminal as the always-on backup for voice and critical data when the flat panel is blocked or degraded. This gives you low cost and high reliability at the same time — the LEO carries the traffic, the L-band guarantees you are never off the grid.
Get an Inmarsat quote
Tell us your vessel type and what you need L-band for — primary voice, operational data, or backup behind Starlink — and we will quote the right Fleet One or FleetBroadband terminal with airtime and install. Sales at Envisiondata Pte Ltd — sales@envisiondatasg.com — or WhatsApp Steve directly on +65 9088 4899.
How we can help
Satellite voice is simple to buy and easy to overpay for. We match handsets and airtime to how your vessels actually operate.
- Free handset and airtime recommendation
- Prepaid and postpaid plans in SGD
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- Activation and support from Singapore
What happens when you contact us
- Short call or meeting — we listen to how your vessels operate.
- Vessel and route review — we check equipment, space, power, contracts and licensing.
- Clear recommendation — a written proposal and SGD quote, with options.
- Install and support — commissioning, testing and ongoing support.
Related: Why fleets now pair Starlink with OneWeb
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About the author
Steve leads Envisiondata Pte Ltd in Singapore. He has more than 20 years in cables, telecom infrastructure and satellite communications across ASEAN. He designs and supports connectivity for tugs, OSVs, harbour craft and commercial fleets across the region.
Written by Steve
Steve has over 20 years of experience in cables, telecom infrastructure and satellite communications across ASEAN. He founded Envision Data to help Singapore and SE Asia vessel operators choose and run the right maritime connectivity, from Starlink and OneWeb to Iridium, Inmarsat and GMDSS.