The airlines have gotten very strict re limits on number of bags and the weight of each individual bag. Most now limit you to two bags and each bag must weigh less than 70 pounds (32 kg). Overweight charges can run $70-$80 one-way (i.e., on the round trip, be prepared to pony up $140 to $160). For a couple going on a dive vacation, 20 pounds of lead could easily put them over the limit.
The airlines defend the surcharge on the basis of homeland security and extra weight necessitating extra jet engine fuel. So consider the following experience from my last trip: The weight limit is applied to each individual bag. and one of my bags was over by 5 pounds. The fact that my other bag was 25 pounds under the 70 pound limit didn't matter; I would have to pay an $80 surcharge. For some reason, the ticket counter clerk was surprised that I insisted on being able to 6 pounds of equipment out of the heavier bag into the lighter bag, rather than pay the $80 charge.
- Homeland security?
How did my equalizing the weight of my bags make us safer?
- Extra cost of fuel?
To some degree, reasonable.
- Diminished mental capacity of the ticket counter clerk?
Sounds highly probable.
- Corporate gouging?
Most definitely!
Re what to carry, a weight belt cut to your waist size (I've been handed too many belts that were too short) with a buckle you trust (I've seen too many buckles that didn't work well) and a pair of one-pound weights for last minute adjustments (I've seen too many dive boats that didn't carry some spare weights or only had four-pound weights available). And even if you don't use them, you will likely end up being a hero to some other diver who isn't as fortunate or as good a planner as you!