Redknapp views the present situation as far more perilous than the one he inherited at Tottenham.
"We're deeper in," he said.
"We're 13 games gone rather than eight and, let's be honest, Tottenham should not have ended up in that position at that stage because they had a fantastic squad.
"We've got to get cracking quickly.
"The target is fourth from bottom. We've just got to get out of trouble. Four points from 13 makes it very difficult but we've got to do it."