That the use of wireless be regulated to prevent interference by amateurs, and that all ships have a wireless operator on constant duty. Detailed recommendations are made as to water-tight bulkhead construction on ocean-going ships. Bulkheads should be so spaced that any two adjacent compartments of a ship might be flooded without sinking. Transverse bulkheads forward and abaft the machinery should be continued watertight to the uppermost continuous structural deck, and this deck should be fitted water-tight.