So you are saying that a Navy Frigat doing 35 knots with its twin 10.000 HP gas turbine engines at full throttle (expending just over 1 liter fuel per second) is in planing mode ?

Speed itself doesn't determine wether you plane or not. The hulls shape has to be designed to go up on a plane otherwise you pretty much stay in displacement mode.

Remember the very old assie 18 skiffs ? Before the introduction of the planing hulls ? Same sailarea and still they couldn't get up to a plane.

Wouter