Under a time charter party, what are the charterers usually responsible for?

Charterers pay for bunker fuel, canal dues, port charges (including light dues if any, pilotage, towage, linesmen, agency, etc. ) and all loading, stowing, trimming and discharging costs. They normally nominate port agents and hire stevedores. Since time charterers are the beneficiaries of the freight, they pay the costs of earning it.