Running surfaced with periscopes up

[Orffen]

I've seen a few videos and some of the loading screen images showing subs running surfaced with both of their scopes up.

I realise this improves visual detection range a bit, but I'm curious as to what the doctrine was during the war.

Did sub commanders run with scopes up, or just rely on their deck watch while surfaced? Was there an official line, or was it just left up to each individual commander to decide?