For the 200 ton level, Oceans Endorsement, you can expect the following 10 questions on your exam based on the requirements of the CFR for this level.

1. Fuel Conservation and Consumption Rates
2. Chronometer and Time Tick
3. Mercator Sailings
4. Great Circle Sailings
5. Astronomy Knowledge such as Hs to Ho
6. Latitude at Meridian Passage of the Sun
7. Latitude by Polaris
8. Zone time of Sunrise and Set
9. Zone time of Meridian Passage
10. Fix and Running Fix using the Sun

These topics will serve you well as a base of knowledge. At the 200 ton level, you should already be familiar with certain near coastal celestial navigation principles per the CFR (Azimuth, Amplitude). Refer to the 200 ton upgrade course if you want to refresh that information (contact instructor for free access if needed).

As you advance your career, you can expect to add complexity at the 500/1600 ton level including using other bodies besides the Sun, solving additional problem types, etc. But for now, focus on that "hit list" and you will be in good shape!