DARPA’s The Sea Train program aims to demonstrate long range deployment capabilities for a distributed fleet of tactical unmanned surface vessels. The program seeks to enable extended transoceanic transit and long-range naval operations by exploiting the efficiencies of a system of connected vessels (Sea Train). The goal is to develop and demonstrate approaches that exploit wave-making resistance reductions to overcome the range limitations inherent in medium unmanned surface vessels. DARPA envisions sea trains formed by physically connecting vessels with various degrees of freedom between the vessels, or vessels sailing in collaborative formations at various distances between the vessels. The weak of October 5, 2020, DARPA awarded Gibbs & Cox a separate $9.5 million contract to develop a “Connectorless Sea Train” concept.