When the Black Triangle 126A programme was cancelled, as ships 3 and 4 were almost complete it was decided to finish them. 126-003 Indigo Three and 126-004 Indigo Four have now joined the first two ships and will join them in an ongoing series of trials and exercises.
DF has not decided on the long-term future for the ships. They may be used for combat training though as DF is aiming to reduce costs, the four ships may be mothballed when the trials are completed.
