Under RIPA Rule 13, when is a vessel deemed to be 'Overtaking' (Alcanzando) another vessel?

1. Only when approaching from dead ahead with both sidelights visible
2. When crossing from the port beam during daylight hours
3. When coming up with another vessel from a direction more than 22.5 degrees abaft her beam (so that at night only her sternlight would be visible)
4. When two vessels are tied together alongside a pier