as I vaguely recall- ONE of the requirements by the navy was low level flight in bad weather on one engine- and was demonstrated with a standard 737 prior to contract award.
and see also
https://www.seattletimes.com/busines...ng-submarines/
Boeing’s P-8 is the 737 with missiles, sonar and a specialty in hunting submarines
Last edited by CONSO; 12th Feb 2019 at 23:19.
Reason: provide links