A massive influx of applications and technical issues with credential producing equipment at the National Maritime Center continue to delay when merchant mariner credentials are being issued, the NMC said April 25. “The Coast Guard is working as quickly as possible to resolve these issues and we do not want these delays to burden the mariner’s ability to use their MMC (merchant mariner credentials),” the center said, adding that these issues don’t impact mariner medical certificates or endorsements processing. To help troubleshoot delays, the NMC announced an interim verification process.  For mariners only serving on domestic voyages, the MMC application…