Related Clues:
- Yachting need
- Waves breaking on shore
- Sale announced that's essential to 21-across
- Blowup: Abbr
- Go too far, as a throw
- Participate in one part of a triathlon
- With 21-Across, ship out?
- Be cruising
- Make some waves
- 1-Across, e.g
- Swell of the sea
- Go from blog to blog, say
- Crawl, perhaps, inside nuns' wimples
- Some URLs recommended for beginners to explore online
- Mariners can do it without one