2 Jump Tenders are waiting at a JP :
Ticonderoga class Jump Tender 35700 tons 506 Crew [...]
JC49K Commercial Jump Drive Max Ship Size 49500 tons Distance 25k km Squadron Size 2
Forrestal class Jump Ship 4150 tons 388 Crew [...]
J6750(3-50) Military Jump Drive Max Ship Size 6750 tons Distance 50k km Squadron Size 3
I send a small military ship to this location with the 'standard transit' order. Here is the pretender :
Belknap class Corvette 4850 tons 463 Crew 401 BP [...]
And the message I get in the Events Log :
26th November 2053 05:34:31,Sol,CT Belknap 001 cannot carry out its standard transit order as at least one ship is larger than the ship with the highest jump rating. No friendly or allied jump ships are available for escort
Considering the relative size and jump capacities of the ships, I don't understand why the jump fails.
NB : Squadron jump also fails, of course.