| You are approaching a drawbridge and have sounded the proper whistle signal requesting it to open. You hear a signal of one prolonged and one short blast from the bridge. Which action should you take? |
| A) Anchor or use an alternate route because the bridge is out of service for an extended period of time. |
| B) Approach under full control to pass through the bridge. |
| C) Hold in the channel as the bridge will open within 15 minutes. |
| D) Approach to a point not closer than 400 yards (360 meters) from the bridge and await further signals. |
