unct ▁professor ▁at ▁the ▁Frank ▁C . ▁Mun son ▁Institute ▁of ▁American ▁Mar itime ▁History ▁since ▁ 1 9 9 0 ▁and ▁served ▁as ▁its ▁director ▁from ▁ 1 9 9 6 ▁to ▁ 2 0 0 1 . ▁ ▁Public ▁and ▁Community ▁Service ▁H att endorf ▁served ▁on ▁the ▁Secretary ▁of ▁the ▁Navy ' s ▁Ad vis ory ▁Sub comm ittee ▁on ▁Naval ▁History ▁from ▁ 2 0 0 4 ▁through ▁ 2 0 0 8 , ▁serving ▁as ▁chairman , ▁ 2 0 0 6 – 2 0 0 8 . ▁He ▁was ▁a ▁member ▁of ▁the ▁Board ▁of ▁Ad vis ors ▁to ▁the ▁Canadian ▁Forces ▁College ▁at ▁Toronto . ▁ ▁For ▁four ▁years ▁from ▁ 2 0 0 3 ▁through ▁ 2 0 0 7 , ▁H att endorf ▁served ▁as ▁President ▁of ▁the ▁North ▁American ▁Society ▁for ▁Ocean ic ▁History ▁and , ▁in ▁that ▁role , ▁head ed ▁the ▁U . S . ▁deleg ation ▁to ▁the ▁International ▁Commission ▁for ▁Mar itime ▁History . ▁He ▁served ▁as ▁one ▁of ▁the ▁commission ' s ▁vice - pres idents , ▁ 2 0 0 5 – 2 0 0 9 . ▁ ▁He ▁is ▁a ▁fellow ▁of ▁the ▁Royal ▁Historical ▁Society ▁and ▁has ▁served ▁as ▁a ▁member ▁of ▁council ▁and ▁vice - pres ident ▁of ▁the ▁H ak lu yt ▁Society ▁( UK ), ▁and ▁was ▁the ▁found ing ▁president ▁of ▁the ▁American ▁Fri ends ▁of ▁the ▁H ak lu yt ▁Society . ▁He ▁has ▁been ▁a ▁member ▁of ▁Council ▁of