In practice the degree of caution and good seamanship seems to vary widely throughout the world. Theoretically, there is no waiver of keeping an adequate lookout (defined as someone who as no other duties while a lookout) yet the rule is often violated in commercial and fishing vessels, and almost always in yachts. Rule 2, the "Responsibility" rule, still obtains, no matter what kind or how much electronics is in use for navigation and piloting. Ne plus change...