Boeing and Gilat clear line-fit milestone for Sidewinder IFC antenna
Boeing and Gilat Satellite Networks have reached what the two companies describe as a key offerability milestone, paving the way for Gilat's Sidewinder electronically steered antenna (ESA) to be offered as a line-fit installation on Boeing commercial aircraft. The arrangement targets in-flight connectivity (IFC) service providers, who will be able to specify the Sidewinder terminal at the point of aircraft order rather than scheduling a costly post-delivery retrofit.
Gilat's Sidewinder is a multi-orbit ESA — meaning it can connect across geostationary, medium-earth-orbit and low-earth-orbit satellite constellations within a single flat-panel form factor. The company says the compact architecture reduces installation complexity and lowers long-term maintenance overhead compared with traditional mechanically steered antennas. By eliminating the retrofit pathway, airlines can theoretically bring connected cabins into service earlier and avoid the aircraft downtime associated with after-market modification programmes.
The deal
The integration will be handled through Boeing's established IFC integration partners rather than directly between Boeing and Gilat. Financial terms were not disclosed, nor did either party name an airline launch customer or indicate how many aircraft the offerability agreement covers. Ron Levin, President of Gilat's Commercial Division, said the partnership "reflects our focus on bringing advanced connectivity solutions to the aviation market," though the release stops well short of confirming a firm order backlog. The Sidewinder is described as an open, vendor-agnostic platform with no service-provider lock-in, which the company positions as a commercial differentiator with airlines already managing multi-vendor satellite contracts.
Market context
Aviation connectivity is entering a more competitive phase as low-earth-orbit broadband capacity from Starlink, OneWeb (now Eutelsat OneWeb) and Amazon Kuiper progressively comes online alongside established geostationary providers such as Intelsat and SES. Multi-orbit ESA terminals are emerging as the preferred hardware response, because they allow operators to blend capacity across orbital layers and switch providers without replacing antenna hardware. Competitors including Viasat, Collins Aerospace, and a number of specialist antenna startups are pursuing similar multi-orbit ESA designs for the aviation market.
Line-fit agreements with airframe manufacturers carry significant commercial weight because they embed a supplier into the aircraft's type-design documentation, giving that vendor a structural advantage over retrofit competitors for the life of the programme. For Gilat — best known for its ground-segment and defence connectivity business — a Boeing line-fit offering would represent a meaningful expansion of its commercial aviation footprint. The company is dual-listed on NASDAQ and the Tel Aviv Stock Exchange and operates through subsidiaries including Gilat Stellar Blu, which focuses specifically on IFC.
Regulatory and standards read-across
ESA terminals for commercial aviation must receive certification from aviation authorities — including FAA Supplemental Type Certificates or equivalent EASA approvals — before entering service. The release does not state the current certification status of the Sidewinder for line-fit installation, nor the anticipated timeline to airworthiness approval, which is typically the critical path item for any new IFC hardware programme. Buyers and investors should treat the "offerability milestone" as a commercial and programme-management step rather than a regulatory clearance.
The broader IFC market is also subject to spectrum licensing and ground-station coordination requirements that vary by jurisdiction, adding a further layer of regulatory complexity for global deployments. As multi-orbit operations become standard, coordination between geostationary and non-geostationary operators is increasingly governed by ITU Radio Regulations, an area where regulatory timelines remain fluid.