This is why I want forward scanning sonar on any passage making vessel... A racer might be moving too fast to take evasive action after the collision alarm is sounded, but at least you get a warning at all.
My only frame of reference for this (because I have not used any commercially available forward scan sonar) is the sonar on a Guided Missile Destroyer. Since one mission of a DDG is to hunt subs, I'm pretty sure we have the most powerful active sonar arrays out there, plus SPY radar can be tuned to pick up even smaller surface targets than we typically expect, like the corner of a partially submerged container poking up from the swells. On a 505 ft 100,000 shaft HP ship with that kind of power in sensors, yes we got a warning and had time to maneuver even at 30kts, but our typical 'cruise' speed on Pacific crossing was 14-17 knots.