Before revision: There is now a specific formula for making an expocode for an oceanographic cruise: NODCYYYYMMDD where: NODC is NOAA's National Oceanographic Data Center's 4-character research vessel identifier .
After revision: There is now a specific formula for making an expocode for an oceanographic cruise: NODCYYYYMMDD where: NODC is NOAA's National Oceanographic Data Center's 4-character research vessel identifier