Because of everyone’s advise, we carried our our regulators, computers and soft weights on our extended dive vacation. TSA was happy I send the weights through in their own small bag and had no concerns after their initial attention.
I have also carried on my GPSr for years without issue. Some airlines won’t let you turn it on during the flight but no one cares if you have it. Check ahead with your airline company’s policy, print it out and use your GPSr if they allow. You’ll enjoy watching your flight progress and learn about the areas as you fly over them.