You can apply for a new US passport or passport renewal and a US passport card at the same time. This is a convenient option for frequent travelers to have both a valid passport for air travel and a passport card for travel to these destinations by land or sea.
As for when you should use a Seal... use Master Seals on non-promoted classes at level 10 to upgrade them, and Second Seals on non-promoted classes at 10 to switch them over to another class tree (mostly worthless, though switching characters that have access to Mercenary, such as the Avatar, over to it ASAP is generally a good idea), or to switch a promoted class into another promoted class at level 15.
The Master Scuba Diver rating places you in an elite group of respected divers who have earned this rating through both significant experience and scuba training. Fewer than two percent of divers ever achieve this rating. When you flash your Master Scuba Diver card, people know that youâve spent time underwater in a variety of environments and had your share of dive adventures. Every diver, who is at least 12 years old, should aim for Master Scuba Diver.