On 25 April 1916, a decision was made by the German Imperial Admiralty to halt indiscriminate attacks by submarines on merchant shipping. This followed protests from neutral countries, notably the United States, that their nationals had been the victims of attacks. Germany agreed that future attacks would only take place in accord with internationally agreed prize rules, which required an attacker to give a warning and allow the crews of vessels time to escape, and not to attack neutral vessels at all. Scheer believed that it would not be possible to continue attacks on these terms, which took away the advantage of secret approach by submarines and left them vulnerable to even relatively small guns on the target ships. Instead, he set about deploying the submarine fleet against military vessels.Tarrant, p. 55.
On 25 April 1916, a decision was made by the German Imperial Admiralty to halt indiscriminate attacks by submarines on merchant shipping. This followed protests from neutral countries, notably the United States, that their nationals had been the victims of attacks. Germany agreed that future attacks would only take place :in accord with internationally agreed prize rules, which required an attacker! to give a warning and allow the crews of vessels time to escape, and not to attack neutral vessels at all. Scheer believed that it would not be possible to continue attacks on these terms, which took away the advantage of secret approach by submarines and left them vulnerable to even relatively small guns on the target ships. Instead, he set about deploying the submarine fleet against military vessels.Tarrant, p. 55.