Marines with 2nd Reconnaissance Battalion, 2nd Marine Division, prepare to dive and perform underwater knot-tying in a Special Operation Command screener during a pre-dive course at Marine Corps Base Camp Lejeune, N.C., May 25 – June 5, 2015. The students had to tie five knots underwater; having only five separate breathing opportunities with only 30 seconds on the surface of the water between tying each knot. - Marines with 2nd Reconnaissance Battalion, 2nd Marine Division, prepare to dive and perform underwater knot-tying in a Special Operation Command screener during a pre-dive course at Marine Corps Base Camp Lejeune, N.C., May 25 – June 5, 2015. The students had to tie five knots underwater; having only five separate breathing opportunities with only 30 seconds on the surface of the water between tying each knot.

(From left to right:) Singaporean Lt. Col. Francis Goh, the commanding officer for the Underwater Demolition Group with Singapore’s Naval Dive Unit; Maj. Gen. James S. Hartsell, the mobilization assistant to the U.S. Pacific Command commander; and Capt. Richard Laszok, the company commander for Bravo Company, 3rd Reconnaissance Battalion, watch as members of the UDG give a presentation over Singapore’s dive tactics Feb. 27, 2015 in one of the School of Infantry-West classrooms in building 223 aboard Marine Corps Base Hawaii. The training was part of Exercise Sandfisher, an annual exercise that provides hands-on experience for Okinawa-based Marines specializing in combatant diving; small-boat operations; underwater navigation; high-altitude, high-opening parachuting and ground reconnaissance tactics. - (From left to right:) Singaporean Lt. Col. Francis Goh, the commanding officer for the Underwater Demolition Group with Singapore’s Naval Dive Unit; Maj. Gen. James S. Hartsell, the mobilization assistant to the U.S. Pacific Command commander; and Capt. Richard Laszok, the company commander for Bravo Company, 3rd Reconnaissance Battalion, watch as members of the UDG give a presentation over Singapore’s dive tactics Feb. 27, 2015 in one of the School of Infantry-West classrooms in building 223 aboard Marine Corps Base Hawaii. The training was part of Exercise Sandfisher, an annual exercise that provides hands-on experience for Okinawa-based Marines specializing in combatant diving; small-boat operations; underwater navigation; high-altitude, high-opening parachuting and ground reconnaissance tactics.

Sgt. Gerry Pratama, from Anahuac, Texas, climbs up the latter after performing the helocasting practical application Nov. 4 during the scout swimmers course at White Beach Naval Facility. Marines rehearsed the procedures they will be doing on the aircraft on pier beforehand hand to ensure readiness. Pratama is a student of the course with Expeditionary Operations Training Group, III Marine Expeditionary Force Headquarters Group, III MEF. - Sgt. Gerry Pratama, from Anahuac, Texas, climbs up the latter after performing the helocasting practical application Nov. 4 during the scout swimmers course at White Beach Naval Facility. Marines rehearsed the procedures they will be doing on the aircraft on pier beforehand hand to ensure readiness. Pratama is a student of the course with Expeditionary Operations Training Group, III Marine Expeditionary Force Headquarters Group, III MEF.