I’ll ignore the obvious ‘stable door, bolted’.
I’ll just give you the ‘how to’ as I was taught.
* Don’t try to drive through deep water unless you absolutely have to. The chances are you will fail unless your vehicle is adequately prepared and unless you know every bump, rise and fall in the terrain you’re trying to cross.
* If you have to drive through deep water on a track or through open country look for higher ground as evidenced by tufts of grass or the surface water being broken by a line of higher ground beneath the surface.
* If you have to drive through deep water on a surfaced or metalled road the higher ground is usually in the middle.
* Halt before the water, change to first gear and open the driver’s door six inches.
* Pull forward very slowly in first gear keeping an eye out for oncoming traffic and vehicles that may approach you from behind too fast.
* Do not let your speed increase but keep the engine revs high by jockeying the clutch. Do not drive quickly.
* As you drive forwards listen through the open door to the water passing underneath the car, if you can hear water breaking as you would with waves forming, slow down. You are moving too quickly.
* If you hear a dramatic hiss where the water has risen to make contact with any part of your exhaust system and you believe the water may deepen you must retrace your tracks. A cooled exhaust system will crack and you will damage your engine as the water is sucked in to your engine block.
* Be completely aware of the path you are taking.
* Be completely aware of the level of water beneath your vehicle.
* Be completely aware of the speed of your vehicle.
* Be completely aware of your engine revs.
* When exiting the water keep your speed very slow.
* When you are sure you have left the water, close your door.
* Drive for 15 yards applying the handbrake gradually until you feel it ‘bite’ then release it.
* Drive for 15 yards applying your footbrake gradually until you feel it ‘bite’ then release it then reapply it gradually for 20 yards then release it.
* Check your electrics (lights, indicators, wipers) and if any have failed you must not continue.
* Increase your speed very gradually to give your engine pan, wheels and braking systems time to dry out.
There you go.
Giving a little something back courtesy of the Army advanced driving instructor who taught me to drive on road, snow, ice, water and oil.
And taught me a bunch of other stuff but close-order and pursuit driving aren’t part of today’s syllabus.