Cruising alitiudes

I’m currently flying longhaul, and I want to know about IFR cruise altitudes.
(idk what its actually called but its like even FL westbound and odd FL eastbound)
I am currently flying north, but sometimes my flightplan takes me 350 ish heading then to 10 degrees ish heading and then back
do i have to change my altitude every time?

YSSY RIC5 KOW YPMP TEDDY BIK SADOK BARAS TODEK OMDOB LEBIX JICHI APU GENIE NUDPO DST SHZ SHZ SUPAR DSH HGH KAKIS KAK71F I25-Y ZSNJ

I suggest using a flight planner such as Simbrief:

it will give appropriate cruise altitudes based on direction, winds, airspace restrictions, etc…

When a flight is heading north/south it will usually stick to one “side” rather than going up and down - but which side they choose can vary.

France and Spain have different RVSM rules where NORTH = EVEN, SOUTH = ODD

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i thought u had to pay for simbrief or smth
I’m alr running broke from the IF subscription lol

No - you can use Simbrief for free.

The default AIRAC is good enough the large majority of the time.

ok tysm :)

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No problem - any other questions feel free to send me a message :)

Have a great rest of your day!

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Nope! Once you fly your first heading then you fly on that for your wholeflight.

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