There are so many abbreviations, would really appreciate help understanding - thank you!

The title of the record is:
MUSTER ROLL OF OFFICERS AND ENLISTED MEN OF THE U.S. MARINE CORPS
CAS CO #1. MARINE DETACHMENT, U.S. NAVAL HOSPITAL, SAN DIEGO, CALIF.
FROM 1 January TO 31 January 1944 INCLUSIVE

The 2-line remark for Chapmond, Tillman H. says:
24, jdfr TkBn., TC., Camp Elliott,
San Diego, Calif; 24-31, sk USNH.