Which mode for boats ?
'Which mode is better?' is a much discussed question amongst the flying community.
I think the issue started in the 1970s, when people moved over from reed systems (which used two separate toggle switches for each control - one pushed a servo in one direction, the other reversed it). This might still cause confusion - old reed sets needed two 'channels' per control (and more if you wanted trims), while nowadays we use digital proportional sets, and talk of one control being 'one channel'.
When the first digital proportional sets came in, like the first cars, there was no standard control configuration, and each manufacturer did his own thing. In the US, manufacturers settled on having the main flying controls (elevator and aileron) on the same right-hand stick, while in Europe, people stuck with the main controls on different sticks, like the reed systems had. That meant turning (aileron) on the right, pitch (elevator) on the left, throttle on the right and rudder (least used) on the left.
None of this mattered at first, because each user had their own radio, learned to fly themselves, and if they wanted one stick on the back of the set and the other on the side that was fine. Gradually, as clubs became common, and being trained to fly many different aircraft became the norm, which sticks you used for what controls became more important. But by then the two different main approachs had become entrenched, and here they remain.
It's not that critical in practice - most sets have a small switch which lets you swap between mode 1 and mode 2, and you could always just plug the servos in different sockets anyway. It's safety-critical to know which mode you're flying for aircraft, but boats don't really have the same control issues, and often use the pistol-grip/steering wheel Scalectric-influenced sets that cars use.
For boats I tend to use rudder on the right, speed on the left, which might count as mode2 if I also had trim tabs on the right....
There was actually some research done which suggested that mode1 was a better way to fly, but I'm not sure if I believe it...