1) Captain Nemo must take his submarine from offshore Manila to offshore Seattle while staying submerged at 1000 m. He asks you, his navigation team, what maps, charts, or data set he should use to avoid running aground on a seamount. He points out he must make the journey without sonar, and that the on-board inertial navigation system has an accuracy of 1 km in the horizontal and 1 m in the vertical.

2) Professor Numero Uno has a contract to develop a global, numerical, model of the ocean's circulation. The model requires oceanic depths every 0.25 degrees of latitude and longitude. What data set should he use and why? Please contrast and compare the recommended data set with other possible data sets.

1. Are data from the World-Wide ship echo-sounder data base sufficient to map all important sea-floor features?

2. What important subsea feature or features were missed in the example cited in Sandwell and Smith's paper on "Global Bathymetric Prediction for Ocean Modeling and Marine Geophysics"? Can you cite specific examples?

3. Where are the missing features located? Note latituded/longitude and name of the oceanic area.

4. Who distributes global bathymetric data sets based on altimetric and ship data? In what form are they distributed?

5. What oceanic areas were NOT mapped by this technique?