This was disclosed by Philippine Navy (PN) flag-officer-in-charge Vice Admiral Jesus Millan in a message to the PNA Saturday.
He also said the dry-docking of the ship is meant to "preserve hull conditions and servicing of machineries."
BRP Gregorio Del Pilar went into drydock during the first quarter of 2015.
The PN acquired the BRP Gregorio Del Pilar (PF-15) in May 2011 while its sister ship, the BRP Ramon Alcaraz, followed suit in May 2012.
The BRP Gregorio Del Pilar was commissioned in December 2011 while BRP Ramon Alcaraz was activated in December 2013.
The Philippine Navy ship BRP Gregorio del Pilar (PF-15) frigate.