If an approach controller responds with "N125HF standby," what should you do?

When an approach controller responds with "N125HF standby," it indicates that the controller needs more time before they can provide further instructions or a traffic clearance. The appropriate action in this situation is to remain outside Class B airspace until the controller provides a specific clearance.

Class B airspace is highly regulated, and entry typically requires a clearance from air traffic control. By waiting for the controller to provide a specific clearance, you ensure compliance with airspace rules and maintain safety by avoiding potential conflicts with other aircraft that may be in controlled airspace. This helps the approach controller manage traffic safely and effectively.

Continuing into Class B airspace without explicit clearance could lead to violations of airspace regulations and compromises safety. Each approach controller's priorities can change, so waiting until you receive definitive instructions is critical.