Mr Gawith was posted to 23 Squadron at Wittering, in Lincolnshire, April 1939, which at the outbreak of WWII took on a night-fighter role.
The squadron flew its first intruder sorties on December 21 with Mr Gawith captaining one of the six Blenheims taking part.
Soon after he led an all-New Zealand crew, who had their first success on March 8, 1941. In May that year, Mr Gawith was behind the destruction of the entire telephone communication system of the German bomber group at Deurne, near Eindhoven.
Awarded the Distinguished Flying Cross, Mr Gawith was posted in June 1941 to command 1451 Flight at Hunsdon, with the rank of Acting Squadron Leader.
Mr Gawith transferred to the RNZAF in 1944 and went as senior RAF liaison officer to the US 9th Air Defence Command, London, with the rank of Acting Wing Commander.
He continued on his liaison duties until December when he relinquished his acting rank and took command of the RAF, Cleave, where army co-operation training was carried out using target drogue-towing aircraft.
Mr Gawith arrived back in New Zealand in 1945 and continued his law studies. After qualifying in 1949, he joined the family firm of solicitors in Masterton.
In August 1949, he was awarded the US Bronze Star for meritorious services in 1944, which was presented to him in Wellington by the American ambassador to this country.
After retiring from the law firm, Mr Gawith moved to Nelson where he died peacefully last Friday at Oakwoods Village.
A service will be held at St Matthews Anglican Church, Masterton, today at 2pm.