. ▁ ▁The ▁Master , ▁ 1 0 0 ▁Ton ▁Cred ential ▁also ▁offers ▁the ▁A ux ili ary ▁S ail ▁end ors ement ▁and ▁an ▁Ass istance ▁Tow ing ▁end ors ement . ▁ ▁For ▁an ▁A ux ili ary ▁S ail ▁end ors ement , ▁ 3 6 0 ▁days ▁of ▁service ▁on ▁sail - ▁or ▁auxili ary - s ail ▁vessels ▁must ▁be ▁demonstrated . ▁For ▁the ▁Ass istance ▁Tow ing ▁end ors ement , ▁a ▁separate ▁exam ▁must ▁be ▁passed . ▁ ▁The ▁Ass istance ▁Tow ing ▁end ors ement ▁must ▁not ▁be ▁confused ▁with ▁App rent ice ▁Mate ▁( Ste ers man )/ M ate ▁( P il ot )/ Master ▁of ▁Tow ing ▁V ess els ▁Lic enses ▁for ▁commercial ▁to wing ▁vessels ▁such ▁as ▁t ug ▁boats , ▁AT B s ▁and ▁IT B s . ▁The ▁Ass istance ▁Tow ing ▁End ors ement ▁only ▁allows ▁the ▁holder ▁to ▁provide ▁assistance ▁to wing ▁of ▁disabled ▁vessels ▁for ▁consideration ▁within ▁the ▁scope ▁and ▁limitations ▁of ▁the ▁license ▁held ▁such ▁as ▁the ▁services ▁provided ▁to ▁recre ational ▁vessels ▁by ▁Sea ▁Tow ▁and ▁Tow ▁Bo at ▁U . S . ▁ ▁References ▁ ▁External ▁links ▁Official ▁U . S . ▁Coast ▁Guard ▁Website ▁ ▁Category : L ic enses ▁Char ter ▁Bo at ▁Captain ' s ▁license ▁Category : Un ited ▁States ▁Mer chant ▁Marine <0x0A> </s> ▁The ▁Port ▁of ▁R ams gate ▁( also ▁known ▁as ▁Port ▁R ams gate , ▁R ams gate ▁Har bour , ▁and