From Wikipedia:

"The Supermarine Sea Otter was a British amphibian aircraft designed and built by Supermarine; it was a longer-range development of the Walrus and was the last biplane flying boat to be designed by Supermarine; it was also the last biplane to enter service with the Royal Navy and the RAF."

(When loading, if anything breaks, just reload)

IMPORTANT!

Before take-off:

Avtivate group 2, slide VTOL down almost to the bottom. Deactivate group 2. Center VTOL.
Activate Group 3, slide VTOL up just slightly (trim control), deactivate group 3. Center VTOL.
Activate Group 1, throttle up, and take-off. Slide VTOL all the way up to raise landing gear.

If taking off from water, just begin with raising the gear and then lock group 3 and return VTOL to center.

Has a tendency to roll to the left. I'm going to say it's due to Prop-torque :P

HAPPY FLYING!