Who supplies U.S. torpedo acoustic arrays? Inside the Navy's production ramp
Published October 7, 2026 / MK 48 and MK 54 supply chain
The U.S. Navy says targeted supplier-improvement efforts have increased output across the torpedo industrial base, including significant gains in acoustic-array production.
MK 48 nose-array assembly increased from four to nine units per month, with a validated path to 12, while MK 54 acoustic-array assembly increased from eight to 13.
MK 48 nose arrays per month
Validated path to 12
MK 54 acoustic arrays per month
Output after supplier-improvement efforts
mapped MK 48 first-tier awards
Ultra Maritime Braintree, FY2021-FY2026
One array manufacturer across three torpedo families
Ultra Maritime, Braintree, Massachusetts
Ultra Maritime sits inside both production chains. Its Braintree operation manufactures the fully assembled acoustic nose array for the MK 48 Mod 7 and similar sections for the MK 54 Mod 0 and MK 58 Compact Rapid Attack Weapon.
Mimir's FY2021-FY2026 data identifies approximately $74 million in mapped first-tier subcontract awards to the Braintree operation under MK 48 awards: approximately $69 million through Lockheed Martin Sippican and $5.6 million through General Dynamics Mission Systems.
The supplier layer beneath the MK 54 array integrator
Reported first-tier subcontract records under Ultra's MK 54 Mod 0 array-kit contract
Mimir identifies 15 first-tier supplier CAGEs in the reported subcontract records. Around 85% of the mapped value passed through four specialist suppliers.
J&E Precision Tool
Frame arrays, tails, electronics housings and nose grinding
Mi-Tech Tungsten Metals
Tungsten isolators and tails
F.H. Peterson Machine
Nose grinding and acoustic-window removal
Mica-Tron Products
Foam isolators
What must scale with array production
The visible supplier chain is not only about sonar electronics. Much of the mapped value sits in precision machining, tungsten components, acoustic isolation, electronics assembly and the manufacture and processing of the acoustic window and surrounding nose structure.
The Navy has already increased array output. Sustaining higher rates across MK 48 and MK 54 will depend on these lower-tier manufacturing capabilities scaling alongside the array integrator.
U.S. Navy torpedo supplier-improvement results, Ultra Maritime MK 48 Mod 7 announcement, Ultra Maritime torpedo nose-array overview, MK 54 Mod 0 array-kit contract notice, USAspending, FPDS and Mimir Data Platform and Modeling.
Mimir analysis covers reported first-tier subcontract awards, FY2021-FY2026. Supplier entities are defined by distinct CAGE codes. The MK 54 records provide a partial view beneath the array-kit contract rather than the complete cost or supplier base of the torpedo. Figures are rounded.