Those who applied for merchant mariner credentials may have to wait a little longer to receive them. The National Maritime Center is delayed in issuing credentials because of heightened application volumes and ongoing technical issues with its credential production equipment, Maritime Center commanding officer Capt. Bradley W. Clare announced April 7. “NMC credential printers remain operational but at a reduced capacity,” Clare said. “While we are unable to provide exact timeframes for completion of your MMC issuance, all efforts are being made to process applications and produce MMCs as quickly as possible.” Mariners should receive status update emails at every…