Kaya didn't give empty promises. The sixty or so people on this ship were shaken to their core, when the ship violently jerked upwards!
It became airborne in just a few seconds, and this sudden shift was so strong that about ten people fell off of the vessel. They were not prepared for this mess!
Thankfully though, Kaya wasn't nearly burdened by these circumstances. When the ship arose about ten meters from the waters, she started picking those people up.
She could multitask easily, as this wasn't the hardest part of having telekinetic powers. She only started struggling half a minute later, when the ship rose fifteen meters high!
It was challenging to keep this thing floating for long, and yes, the ship's weight had something to do with it. Its weight became burdening, but thankfully, she did manage to save everyone that fell overboard, so that was one thing less to worry about.