Royal Thai Navy : Makut Rajakumarn Class 1973
2×Mark 8 Mod 0 4.5 inch general purpose guns
1xtriple Sea Cat surface-to-air missile launcher
2xBofors 40/60 mm AA guns
2 × 12.7mm machine guns
1xThales DA05 surveillance and targeting radar
1xDECCA 1229 surface search/navigation radar
1xThales WM22 mod 61 fire control radar
1xGWS-24 gun and missile director
1xTarget Designation Sight (TDS)
1xPlessey PMS-26 hull sonar
HTMS Makut Rajakumarn 1988
Install Thales SEWACO (FORESEE-TH) CMS
-Install 1xThales ZW06 a surface search and navigation radar
-Install ESM Elettronica ELT 211
-Install ECM noise jammer Elettronica ELT 318, with 4xELT 828 antennas inside spherical dome
-Install Sippican Mk 33 RBOC Decoy
-install Thales Link Y Mk 1
HTMS Makut Rajakumarn 1998
-Replace Sea Cat Launcher by OTOBreda 40 mm/70 Bofors Twin Compact naval gun
-Replace Limbo Mk 10 Anti Submarine Mortar by 2xPMW49A (STWS-2) Torpedo Launcher for BAE Sting Ray Lightweight acoustic homing torpedo
-Replace Plessey PMS-26 hull sonar by Atlas DSQS-21C Active Search/Attack Sonar sonar
-Replace 2xBofors 40/60 mm AA guns by 2xRheinmetall Rh 202 20 mm cannon
-Install 1xSATCOM
-Install 1xKoden navigation radars