The term nautical signal flag is identified in base64 scheme by the sequence bmF1dGljYWwgc2lnbmFsIGZsYWc=, while the MD5 signature is equal to 77457075ff8264e4b87d67140dea5d59. The ASCII encoding of nautical signal flag in hexadecimal notation is 6e6175746963616c207369676e616c20666c6167.