O se 3-layer system faʻaaogaina i luga o se uaea laau poʻo le spacer cable, gaosia, faʻataʻitaʻiina ma faʻailogaina e tusa ai ma le ICEA S-121-733, le faʻataʻitaʻiga mo le Uea Laʻau ma le Messenger Supported Spacer Cable.O lenei faiga fa'avae 3 e aofia ai se talipupuni ta'ita'i (layer #1), soso'o ma le 2-layer cover (layers #2 ma #3).