Happy birthday to the U.S. Navy Submarine Force! From the depths, we strike! Answering the nation's call for 121 years— The work of our Silent Service is critical to our nation's defense. #NationalSubmarineDay Vice Adm. Daryl Caudle, Commander, Submarine Forces, and Force Master Chief Steven Bosco wish a Happy 121st Birthday to the Submarine Force and thank the submariners and their families who work tirelessly to execute our mission. 📺 by Mass Communication Specialist 1st Class Alfred Coffield

U.S. Navy Petty Officer 1st Class Richard Shivers, from, Philadelphia, Pennsylvania, assigned to Naval Submarine School, recites the oath of enlistment given by Lt. Cmdr. Frank Ferrell, N4 Dept. Head, Naval Submarine School, during his reenlistment ceremony onboard Naval Submarine Base New London. Naval Submarine School builds a foundation upon which officers and enlisted personnel are prepared to develop the competence and proficiency in skills necessary to operate and maintain their submarines

🌊 Below the horizon, unknown, and undetected. Our submarines. 📆Today marks the 1st anniversary since our Invincible-class submarines, RSS Invincible and RSS Impeccable, were commissioned and operationalised. 👁️ Take a peek into what our submarines do, and what it takes to be ‘Invisible, Invincible’ - the motto of our 7th Flotilla. #BelowTheHorizon #InvisibleInvincible #submarine #underwater | Republic of Singapore Navy