I do not know anything other than the words in this
Sea Vixen FAW Mk2 pilot notes page here:
"...
7 Crash and hazardous landings
(a) When crash landing, if possible, jettison stores. The undercarriage should be lowered regardless of terrain. Immediately prior to touchdown close both HP cocks, operate all three extinguishers and switch battery master OFF. Brace before impact.
(b) In the event of a hazardous landing where undercarriage units are partially or fully retracted, full or partially full drop tanks must be jettisoned. Empty tanks should be retained. The pilot's canopy should not be jettisoned...."
https://www.seavixen.org/images/docu...Procedures.pdf (3.5Mb)