Self-activating Smoke Signal

자동연발신호

Seating Ring

자리링

Sister Ship

자매선

Spontaneous Ignition

자연발화

Spontaneous Combudtion

자연연소

Self-propulsion Test

자항시험

Submersible-research Vehicle

잠수조사선

Submersible Dredger

잠수준설선

Subnarine, Underwater Craft

잠수함

Submarine Rescue Ship

잠수함구조선