A rough rule for estimating the towing power of a tug fitted with reciprocating engines is to allow a pull of one ton for every 100 units of indicated horse-power.
Umthetho ongqongqo ekucingeleni amandla okutsala kodokolwana ofakwe nee-injini ezibuyiselayo kukurumela ukutsalwa kwetoni enye kulinganiselo wekhulu womsebenzi olingana namandla okunyusa bamawaka angamashumi amathathu anantathu eenyawo zomlinganiselo ngomzuzu obonakalisiweyo.