Danny,
A further quote; 'On 11th February 1944, No.84 Squadron arrived at Kumbhirgam in Assam and joined No. 168 wing. The first operational mission took place on 16th February when 14 Vengeances dive-bombed Japanese positions in Burma.'
(Continuing) 'By careful attention to engine handling during the climb over the mountains en route to the target and during the cruise at 10,000-12,000feet 84 squadron were able to accept targets deep into Burma almost half as far as any of the other Vengeance squadrons.'
Does this explanation help?