| May be done by using standard fuel density values as specified in EU - OPS 1. |
| May be done by using standard fuel density values as specified in the Operations Manual, if the actual fuel density is not known. |
| Must be done using fuel density values of 0.79 for JP 1 and 0.76 for JP 4 as specified in EU - OPS, IEM - OPS 1.605E. |
| Must be done by using actual measured fuel density values. |
EN 