What does the phrase standing into danger mean?

Answer 1

I first heard this phrase from an ex-signalman sailor from WW1.

Used when a tea trolley was being pushed across the hospital ward, I took it to mean 'If you stay right there you'll be run down'.

Checking with a petty officer R.N. he agreed this was one useage but didn't say what the others were.

Answer 2

It is a mariners phrase. A warning to someone that what they are doing is likely to have unfortunate consequences.