This is how you sign Submarine in American Sign Language.

How to sign

To sign "Submarine" in American Sign Language in ASL, keep your non-dominant hand open, fingers together, pointing forward. Form a '3' handshape with your dominant hand, fingertips also pointing forward. Bring the palm of your dominant hand close to the palm of your non-dominant hand, then move it downward.

To sign "Submarine" in American Sign Language (ASL), hold your non-dominant hand flat, fingers together, pointing forward. Make a '3' hand shape with your dominant hand, with fingertips pointing forward as well. Place the palm of your dominant hand near the palm of your non-dominant hand, then glide it downward.