RE: RE: Waste of space (and energy) Marine Traffic is not a reliable source for vessel specifications.
The BW Athena had (prior to lengthening) a maximum speed of 12.5 knots. They will be slowed down by the canal, they may choose to sail at less than maximum - usually this is done for fuel economy, and not applicable when chasing a contract commencement - and the lengthening an additional weights may have an affect.
They could probably achieve 8 knots under two.