The spyglasses spotting ability is simulating the mindset of war tactician and awareness of the enemy in a very simple and cheaty way.
The rangefinder should give the same impression in the way a rangefinder would be helpful in a game as well. But how? And that is the question here.
For those of you who say that the rangefinder is just an extra data tool do not see the waste of space and content the rangefinder is providing. A selection that shouldn't be a selection.
And as a game element, it does absolutely nothing but tell range, but the devs did try to simulate a way it would help a gunner (And that is the circle thing) Which they did not make 100% accurate because of how it can prove to be too good if it did do it 100% accurate.
And you know what... I think the circle thing should be accurate, that way we dont have a SUPER obvious reticle like in practice mode, but a vague one where you have to aim around and find the sweet spot.
What is also interesting (SOMETHING NO ONE MENTIONED) is that the circle thing predicts their speed. So a speeding galleon moving from left to right, you can make the long range shot with the circle thingy without leading the shot yourself.
The trade off here is, Someone has to be Aiming at that specific ship with the Rangefinder in order for the gunners to get any use for it.
But the rangefinder sucks dick simply because of the circle thing is NOT 100% accurate on purpose, And if it did, it still would not guarantee you shots because the speed and altitude of the ship can change by the time the predicted landing of the shot would go there.
So my suggestion is,
-Make the rangefinder helper circle thing better, or more obvious, and/or 100% Accurate.
The cons are,
-Occupies one person
-Gunners searching for a sweet spot
-2/4 people dont have Spyglass OR Pilot has 1 less ship tool
With this, Sniping can be misleading if you are using the helper and being charged at with his movement being too erratic for the rangefinder to help you.
Giving bad habits, but ultimately makes sniping a mind game of movement if it becomes useful.