Does anyone know how to find Klaus?

[bea]

Is the mission where the old lady asks Dave to help find the white shark who killed her husband, I can't find it

[Tannhauser]

For me, the vortex was found at a depth of about 20, at the far right edge, at night.

[onigiri_saikou]

Klaus is only in the shallows, so don't go below 50m
also, you can only find him on stormy night, so check ur weather forecast and unlock night dive.
you will find a vortex during that time with loud water sound effect as you get closer.
for me, i found the vortex at far right of the map

[bea]

thank you!!

[Linarkspain]

Go VERY prepared. The fight is, by miles, a LOT harder than anything you've faced till now. To the point of being ridiculuos. Improve weapons, search the sea for upgrades, HP tanks and jets. Use your drone on something good in case you cant win (at least you dont loose that).
And prepare for a lot of attempts.