"The Pentagon has completed initial draft plans for several emerging low-yield sea-launched nuclear weapons intended to deter potential attackers and add new precision strike options to those currently possible with the existing arsenal.
While final requirements for both a low-yield sea-launched nuclear cruise missile and long-range sub-launched low-yield warhead are still in development, Pentagon officials tell Warrior Maven the process has taken several substantial new steps forward."
A Trident missile with a low-yield warhead "would offer a yet-to-exist long-range low-yield sea launched weapon. The existing Trident II D5 has a massive 100-kiloton yield, bringing massive destructive power to large swaths of territories – entire cities and well beyond." foxnews.com/tech/2018/06/05/pentagon-completes-draft-plans-for-new-low-yield-sea-launched-nuclear-weapon.html [foxnews.com]