<P> On 21 August 2017, while on a routine visit to Singapore, Arleigh Burke - class destroyer USS John S. McCain (DDG - 56) was involved in a collision with merchant vessel Alnic MC off the coast of Singapore, east of the Strait of Malacca . The incident left 10 Navy sailors missing and five injured . The US Navy announced that Commander of the Seventh Fleet Vice Adm. Joseph Aucoin had been dismissed and replaced by Vice Adm. Phillip G. Sawyer, who had already been nominated and confirmed to replace the retiring Aucoin . </P> <P> The Seventh Fleet is organized into specialized task forces . </P> <P> Task Force 70--TF 70 is the Battle Force of 7th Fleet and is made up of two distinct components: Surface Combatant Force 7th Fleet, composed of cruisers and destroyers, and Carrier Strike Force 7th Fleet, made up of at least one aircraft carrier and its embarked air wing . The Battle Force is currently centered around Carrier Strike Group Five, the carrier USS Ronald Reagan (CVN - 76) responsible for unit - level training, integrated training, and material readiness for the group's ships and aviation squadrons . As the only continuously forward deployed carrier strike group, the CSG - 5 staff does not stand down when the strike group is in Yokosuka, but instead continues to maintain command responsibilities over deploying Carrier Strike Groups and independently deployed cruisers, destroyers, and frigates that operate in the Seventh Fleet operating area . The commander and staff are also responsible for the higher level Task Force 70 duties throughout the year in addition to the CSG - 5 duties . The composition of the strike group in immediate proximity of Ronald Reagan varies throughout the year . </P> <P> The CSG 5 Commander also serves as Battle Force Seventh Fleet and Commander, Task Force (CTF 70) for 7th Fleet . In these responsibilities, CSG 5 serves as the Commander of all surface forces (carrier strike groups, independently deploying cruisers, destroyers and frigates) in the 7th Fleet area of responsibility . CTF 70 also serves as the Theater Surface Warfare Commander (TSUWC) and Theater Integrated Air Missile Defense Commander (TIAMDC) for Seventh Fleet . </P>

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