The Achilles Communications Officer is a Human male and a sailor who served on the Achilles. He was the communications officer back in 1939 when Ba'al and his Jaffa invaded the Achilles. He tried to radio for help but failed and was shot by one of Ba'al's Jaffa. However, when Cameron Mitchell traveled back in time like Ba'al had done and reached 1939, Mitchell was able to kill Ba'al and his Jaffa, saving the sailor's life and restoring the timeline. (Stargate Continuum)