Noun
backlead (plural backleads)
(fishing) An additional weight on a fishing line, to ensure that the line rests on the bed of the lake.
Collision avoidance is one of the cases when the follow is required to "backlead" or at least to communicate about the danger to the lead. Source: Internet
The first, superficial, difference: hijacking is usually an occasional "outburst" of the Follow, which otherwise diligently follows the lead, while a "backlead" may do this almost on every other step. Source: Internet