3 ms·

It's a roughly accurate measure though. If there's a storm that slows them down, it would be perfectly acceptable for them to burn more fuel to arrive in port o

It's a roughly accurate measure though. If there's a storm that slows them down, it would be perfectly acceptable for them to burn more fuel to arrive in port on time.

andy_ppp 7y ago
I think you are wrong about this, there are so many variables and sea conditions can affect things, for example older engines and maintenance at sea. AIS data is also known to be wildly inaccurate. Source: built an engine performance model at a maritime company.
- toomuchtodo 7y ago
  Require reporting engine run times and performance stats to regulatory bodies, along with fuel loading data from fuel providers.
  - jsharf 7y ago
    Too easy to fake. Maybe instead base it off of fuel consumption. At the end of the day, they can't fake a full tank of gas -- Require it to be documented when they buy fuel and use that to approximate what they're using for a cross-seas voyage (giving appropriate margin so that in case of storm/emergency they can still make it, but perhaps tax them if they eat into buffer)
  - adrianN 7y ago
    Or just put a carbon tax on the fuel.
  - andy_ppp 7y ago
    Actually laughing at this, you have no idea, the people onboard type in the engine data and usually they type the exact same thing as the last reading with some decimal points changed and 0 if they were stopped (even though ships use plenty of fuel even if stopped usually).
safasfasf 7y ago
"It's a roughly accurate measure though" It's the ships speed relative to the water what causes any fuel consumption. For the purposes of saving fuel, if you don't know the water surface speed, you know nothing.
- andy_ppp 7y ago
  Precisely! You could be going slowly against the tide or current or weather and using loads more fuel - you ask anyone who has been at sea about weather and localised conditions that don't show up on satellites are common enough for me to believe the on ship reports.

It's a roughly accurate measure though. If there's a storm that slows them down, it would be perfectly acceptable for them to burn more fuel to arrive in port on time.

andy_ppp 7y ago

I think you are wrong about this, there are so many variables and sea conditions can affect things, for example older engines and maintenance at sea. AIS data is also known to be wildly inaccurate. Source: built an engine performance model at a maritime company.

toomuchtodo 7y ago
Require reporting engine run times and performance stats to regulatory bodies, along with fuel loading data from fuel providers.
- jsharf 7y ago
  Too easy to fake. Maybe instead base it off of fuel consumption. At the end of the day, they can't fake a full tank of gas -- Require it to be documented when they buy fuel and use that to approximate what they're using for a cross-seas voyage (giving appropriate margin so that in case of storm/emergency they can still make it, but perhaps tax them if they eat into buffer)
- adrianN 7y ago
  Or just put a carbon tax on the fuel.
- andy_ppp 7y ago
  Actually laughing at this, you have no idea, the people onboard type in the engine data and usually they type the exact same thing as the last reading with some decimal points changed and 0 if they were stopped (even though ships use plenty of fuel even if stopped usually).

safasfasf 7y ago

"It's a roughly accurate measure though" It's the ships speed relative to the water what causes any fuel consumption. For the purposes of saving fuel, if you don't know the water surface speed, you know nothing.

andy_ppp 7y ago
Precisely! You could be going slowly against the tide or current or weather and using loads more fuel - you ask anyone who has been at sea about weather and localised conditions that don't show up on satellites are common enough for me to believe the on ship reports.