5 ms·

Realistically you'll see that sailboat in advance.

by AYBABTME 3y ago

olyjohn 3y ago
At 100+mph?
- AYBABTME 3y ago
  My sailboat uses radar, I can see things from a good distance away. Let's say 30NM. Surely the plane will do better. But let's say it's going 180mph, or ~160kts. That's 11min from first radar contact to collision. With all that forewarning, avoiding a yacht isn't a big deal. If they can't avoid it, they can stop with 11min warning. Let's say visual only. There will be restrictions on visibility for visual flight rules. So say that they can only fly with more than 10NM of visibility. That's still 3m45s to take action. Surely enough.
  - roflyear 3y ago
    Just for others here, this is very misleading: 1) Sailboats (even moderately sized ones) often do not show on radar at all. 2) 30nm is probably way too optimistic, at a height of 50ft your line of sight is only about 8-9nm. Radar is LOS. 3) 11m is a terrifyingly short time, even if this was all correct 4) you can't identify things based on radar alone, and there's no way you can make out what something is even at 5nm. 5) there's no way you can see a boat at 10nm lol
    - Brusco_RF 3y ago
      > 11m is a terrifyingly short time, even if this was all correct Is it? How much warning do you get when a car brakes in front of you on the highway? In 11m you could write a report on how to avoid the collision prior to actually performing the maneuver
      - roflyear 3y ago
        Cars have lanes etc.. it's very different on the water. Hard to tell often if someone is going to hit you or not. Distances are nearly impossible to judge.
- wthalheimer 3y ago
  Yes we'll have several sensor systems onboard that augments the captains visual perception, including radar, AIS, and we're looking into computer vision systems as well. We've been testing these sensor suites in helicopters today. Flying <50 ft off the water at speeds in excess of 100 mph, simulating the seaglider operating conditions. We have plenty of time to detect and avoid traffic even in crowded waterways at speed.

Realistically you'll see that sailboat in advance.

olyjohn 3y ago

At 100+mph?

AYBABTME 3y ago
My sailboat uses radar, I can see things from a good distance away. Let's say 30NM. Surely the plane will do better. But let's say it's going 180mph, or ~160kts. That's 11min from first radar contact to collision. With all that forewarning, avoiding a yacht isn't a big deal. If they can't avoid it, they can stop with 11min warning. Let's say visual only. There will be restrictions on visibility for visual flight rules. So say that they can only fly with more than 10NM of visibility. That's still 3m45s to take action. Surely enough.
- roflyear 3y ago
  Just for others here, this is very misleading: 1) Sailboats (even moderately sized ones) often do not show on radar at all. 2) 30nm is probably way too optimistic, at a height of 50ft your line of sight is only about 8-9nm. Radar is LOS. 3) 11m is a terrifyingly short time, even if this was all correct 4) you can't identify things based on radar alone, and there's no way you can make out what something is even at 5nm. 5) there's no way you can see a boat at 10nm lol
  - Brusco_RF 3y ago
    > 11m is a terrifyingly short time, even if this was all correct Is it? How much warning do you get when a car brakes in front of you on the highway? In 11m you could write a report on how to avoid the collision prior to actually performing the maneuver
    - roflyear 3y ago
      Cars have lanes etc.. it's very different on the water. Hard to tell often if someone is going to hit you or not. Distances are nearly impossible to judge.
wthalheimer 3y ago
Yes we'll have several sensor systems onboard that augments the captains visual perception, including radar, AIS, and we're looking into computer vision systems as well. We've been testing these sensor suites in helicopters today. Flying <50 ft off the water at speeds in excess of 100 mph, simulating the seaglider operating conditions. We have plenty of time to detect and avoid traffic even in crowded waterways at speed.