Poseidon's Forge unveils M4P: Open protocol for maritime mesh networking
New delay-tolerant protocol M4P enables resilient AUV communication underwater, based on real defense programs.
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The Maritime Community Group’s May 2026 working meeting features the debut of M4P (Multi-Modal Maritime Mesh Protocol), an open standard for delay-tolerant maritime mesh networking. Presented by Peter Girard—founding software engineer and primary architect at Poseidon’s Forge—the protocol is grounded in real-world AUV programs. Girard previously led software for the first successful AUV torpedo tube launch and recovery from a moving submarine at L3Harris, giving M4P a pedigree in both defense and commercial subsea operations.
M4P addresses the unique challenges of underwater communication: high latency, intermittent connectivity, and limited bandwidth. By using a delay-tolerant mesh approach, autonomous underwater vehicles can relay data across long distances without requiring constant line-of-sight or satellite links. The protocol’s design leverages multi-modal communication channels (acoustic, optical, RF) to ensure reliability in dynamic ocean environments. The meeting invites community discussion and contributions through the ROS-Marine ecosystem, with resources available on the Maritime Robotic Landscape site. This open protocol could accelerate advancements in ocean exploration, environmental monitoring, and naval operations.
- M4P is an open, delay-tolerant protocol for maritime mesh networking, designed for autonomous underwater vehicles.
- Protocol architecture is drawn from 8 years of defense and commercial AUV programs, including torpedo tube launch operations.
- Enables multi-vehicle coordination and subsea communication using multi-modal channels (acoustic, optical, RF).
Why It Matters
Resilient underwater networking is critical for autonomous ocean exploration, defense, and commercial AUV operations.