On this coin Emperor Constantius II, 324-361 A.D., stands on the galley of a ship holding a phoenix (an ancient symbol of renewal and/or immortality) and a labarum. The ship galley in this period was viewed as a "Ship of State"; a ship also represented the Christian Church. The ship and Emperor are being propelled and guided by the kneeling person at the right (having wings?--an angel?). So this scene could represent the Emperor and nation being directed by Christianity.
On this coin Emperor Constantius II stands besides two captives and holds a labarum.