“Catapult Turtle’s” effect is [Spell] Speed 1 and is a[n Ignition] Effect.
“Catapult Turtle’s” effect may be used once immediately upon summoning before the opponent may respond with an appropriate Trap Card like “Torrential Tribute” or “Trap Hole.”
“Catapult Turtle” may Tribute itself for its effect.
“Catapult Turtle’s” effect is based on the current ATK of the monster at the moment it is Tributed.
Face-down monsters may be Tributed for “Catapult Turtle’s” effect.