Frosty, apart from fashion, the B58 had individual modules, the F111 was going to be near mach at nought feet and a module was thought better.
One went in off Tain in the 70s - a long time ago. The crew remained buttoned up in the module and climbed into their immersion suits. A fishing boat came along side and once secure and suited they opened the hatch and boarded the boat.
At least one then took his used-once, never wet, suit off and presented it to the crew.
If it worked what would you rather?