The Naval Surface Warfare Center, Philadelphia Division requires annual calibration and certification services for ten dynamometers and one crane scale, plus as-needed repairs and recalibrations under a not-to-exceed line item. Services must conform to ASTM E74 and ISO 376 standards. Offerors need proof of current accreditation from a Navy-approved accrediting body (A2LA, ANAB, or NAVLAP). This is a 100% total small business set-aside, open only to small businesses. No location or budget amounts are specified.