Let's start with the Falkland Islands, South Georgia and the South Sandwich Islands, and the British Antarctic Territory:
Falkland Islands:
Per fess azure and barry wavy argent and azure, in chief a ram proper upon a grassy mount issuant from the division vert, and in base a galley proper, its mainsail charged with four torts in cross.
https://en.wikipedia.org/wiki/Coat_of_arms_of_the_Falkland_Islands
South Georgia & the South Sandwich Islands:
https://en.wikipedia.org/wiki/Coat_of_arms_of_South_Georgia_and_the_South_Sandwich_Islands
The rather amateurish emblazonment assumes that the field is argent and bleu celeste which it isn't. The azure should be the same tint as in the mantling. (The arms of the Falkland Islands also suggest the use of bleu celeste rather than azure as specified in the blazon, but in this case I suspect the use of a lighter blue was deliberate to make the arms more visible when used on the Falklands' blue ensign.)
British Antarctic Territory:
https://en.wikipedia.org/wiki/Coat_of_arms_of_the_British_Antarctic_Territory