The U.S. Navy awarded Carlsbad-based ViaSat Inc. an electronics contract that could be worth as much as $478.6 million over five years, the Pentagon announced on May 28.

The indefinite delivery, indefinite quantity contract covers the production, development and sustainment of MIDS JTRS radio terminals for the U.S. Navy and other services. A small portion of the contract — 1 percent — will go toward foreign military sales to U.S. allies.

MIDS JTRS is a four-channel software-defined radio that carries voice and broadband data securely and has several advanced features. The MIDS JTRS abbreviation stands for Multifunctional Information Distribution System Joint Tactical Radio System.

The Navy may issue task orders up to the $478.6 million ceiling amount.

ViaSat (Nasdaq: VSAT) will perform all work at its Carlsbad office.

The contract was not competitively procured, the Pentagon said, because it is a follow-on contract with only one responsible source.

SPAWAR, the Space and Naval Warfare Systems Command of San Diego, awarded the deal.