. ▁ ▁International ▁Space ▁Station ▁ ▁The ▁I SS ▁also ▁uses ▁Wh ipp le ▁shield ing ▁to ▁protect ▁its ▁interior ▁from ▁minor ▁de br is . ▁However , ▁exterior ▁port ions ▁( not ably ▁its ▁solar ▁pan els ) ▁cannot ▁be ▁protected ▁easily . ▁In ▁ 1 9 8 9 , ▁the ▁I SS ▁pan els ▁were ▁predicted ▁to ▁deg rade ▁approximately ▁ 0 . 2 3 % ▁in ▁four ▁years ▁due ▁to ▁the ▁" s and blast ing " ▁effect ▁of ▁impact s ▁with ▁small ▁orb ital ▁de br is . ▁An ▁avoid ance ▁man eu ver ▁is ▁typically ▁performed ▁for ▁the ▁I SS ▁if ▁" there ▁is ▁a ▁greater ▁than ▁one - in - 1 0 , 0 0 0 ▁chance ▁of ▁a ▁de br is ▁strike ". ▁, ▁there ▁have ▁been ▁six teen ▁man eu vers ▁in ▁the ▁fifteen ▁years ▁the ▁I SS ▁had ▁been ▁in ▁orbit . ▁ ▁As ▁another ▁method ▁to ▁reduce ▁the ▁risk ▁to ▁humans ▁on ▁board , ▁I SS ▁oper ational ▁management ▁asked ▁the ▁crew ▁to ▁shelter ▁in ▁the ▁So y uz ▁on ▁three ▁occasions ▁due ▁to ▁late ▁de br is - pro xim ity ▁warnings . ▁In ▁addition ▁to ▁the ▁six teen ▁thr uster ▁fir ings ▁and ▁three ▁So y uz - c aps ule ▁shelter ▁orders , ▁one ▁attempted ▁man eu ver ▁was ▁not ▁completed ▁due ▁to ▁not ▁having ▁the ▁several ▁days ' ▁warning ▁necessary ▁to ▁upload ▁the ▁man eu ver ▁tim eline ▁to ▁the ▁station ' s ▁computer . ▁A ▁March ▁ 2