Day 1 at DSEI 2021 in London, UK. We focused on new anti-ship missiles, the Sea Breaker by Rafael, the Sea Serpent by IAI and Thales UK. We then take a look at two new OPV designs: The VARD 7 115 NGOPV and the MPV 80 by OMT. We then discuss with SH Defence about "The Cube" modular mission module.