write_1d(header_file, KEY, LOCSIZ + 1, "KEY");
write_1d(header_file, LOCSND, LOCSIZ + 1, "LOCSND");
write_1d(header_file, TRAVEL, TRVSIZ + 1, "TRAVEL");
write_1d(header_file, KEY, LOCSIZ + 1, "KEY");
write_1d(header_file, LOCSND, LOCSIZ + 1, "LOCSND");
write_1d(header_file, TRAVEL, TRVSIZ + 1, "TRAVEL");