The Australian Institute reported that delays to starting Hunter build have mainly centred around the additional top weight of the CEAFAR AESA various radar band antennas, though significantly superior to the old gen Artisan S-band radar of the Type 26. The Australian developed CEAFAR was specified as the RAN wanted a much better anti-air warfare capability for its prime ASW ship, the additional topweight led to the beam having to be increased by 0.6m over the Type 26 plus a major increase in cooling capacity and crew numbers etc., even small changes to the dimensions of a ship involve significant recalculation and work for the naval architects which can see replicated with the Constellation where the hull dimensions were changed and the originally claimed 85% commonality to the parent Italian FREMM frigate now said to be under 15%, in effect a new ship, leading to a three year program delay, hopefully the max delay though as detail design still less than 80% complete time for some possible nasty surprises.