Palindrome Distress signal

Palindrome - a word, phrase, verse, or sentence that reads the same backward or forward.
Word

What call for help, when written in capital letters,
is the same forwards, backwards and upside down?







Did you get the answer to yesterday's teaser?

Look below for the answer to yesterday's teaser.











What word becomes a palindrome when viewed upside down and backwards?
= SWIMS