Ok so I am building an underwater ROV sonar prototype. Which is going to be just my arduino, a sonar sensor, and my computer.
Here is what I need to Know
-Which is better underwater for finding things within a distance of 1cm to about a few feet, ultrasound sensor, or a sonar sensor? Which is more accurate underwater?
-Where can I buy the sensor?
-Where can I learn how to program the sensor because I am very new to arduino and I am going a little advanced for my skill level right now.
-If possible, I need an answer quickly, I have to have something built by Oct 10th
Thank you so much in advance, this is for an interview and I am a high school student.