Under COLREGs Rule 19 (Conduct of Vessels in Restricted Visibility), when a vessel detects another vessel forward of her beam solely by radar and determines that a close-quarters situation is developing, what course alteration should generally be avoided?

1. An alteration of course to port for a vessel forward of the beam, other than for a vessel being overtaken
2. An alteration of course to starboard
3. Reducing speed to minimum steerage way
4. Sounding the fog signal required by Rule 35