Japanese "Speed Limit"
Thread Starter
Joined: Apr 2008
Posts: 461
Likes: 1
From: A tropical island.
Japanese "Speed Limit"
I recall that Japan used to have a "Speed Control" requirement listed in the airway manuals for 250 knots below 10,000' and 200 knots below 3,000'. When I was recently going thru the (Jeppesen) manuals I noticed it is not there anymore. Is anyone aware of this being changed? Did I miss it, was it moved, or deleted altogether?
Joined: Apr 2002
Posts: 387
Likes: 2
From: shoe box
Not sure about the Jepps as our company doesn't use them, but it's most definitely still a requirement. You can find the Japanese AIP online here https://aisjapan.mlit.go.jp/Login.do it's free, you just need to create an account.
To save you the trouble, here's an extract from section ENR1 GENERAL RULES AND PROCEDURES:
To save you the trouble, here's an extract from section ENR1 GENERAL RULES AND PROCEDURES:
8. Aircraft Speed Limitation
Any aircraft shall not be operated at an indicated airspeed of more
than
a) At or below 900m(3,000 ft) above MSL within control zone;
1) in the case of a reciprocating engine aircraft, 160 knots;
or
2) In the case of a turbine-powered aircraft, 200 knots
b) Above 900m (3,000ft) above MSL within control zone, or at
or below 3,000m (10,000ft) above mean sea level within a
approach control area, 250 knots
However if aircraft is instructed by ATC to be operated at a
greater airspeed than the maximum airspeed prescribed
above, the aircraft may be operated at that airspeed, or the
minimum safe airspeed to ensure safe operation is greater
than the maximum airspeed prescribed above, the aircraft
may be operated at that minimum safe airspeed. Above
provisions may not be applied if a permission is obtained
from the Minister of Land, Infrastructure, Transport and
Tourism.
Any aircraft shall not be operated at an indicated airspeed of more
than
a) At or below 900m(3,000 ft) above MSL within control zone;
1) in the case of a reciprocating engine aircraft, 160 knots;
or
2) In the case of a turbine-powered aircraft, 200 knots
b) Above 900m (3,000ft) above MSL within control zone, or at
or below 3,000m (10,000ft) above mean sea level within a
approach control area, 250 knots
However if aircraft is instructed by ATC to be operated at a
greater airspeed than the maximum airspeed prescribed
above, the aircraft may be operated at that airspeed, or the
minimum safe airspeed to ensure safe operation is greater
than the maximum airspeed prescribed above, the aircraft
may be operated at that minimum safe airspeed. Above
provisions may not be applied if a permission is obtained
from the Minister of Land, Infrastructure, Transport and
Tourism.
Thread Starter
Joined: Apr 2008
Posts: 461
Likes: 1
From: A tropical island.
Not sure about the Jepps as our company doesn't use them, but it's most definitely still a requirement. You can find the Japanese AIP online here https://aisjapan.mlit.go.jp/Login.do it's free, you just need to create an account.
To save you the trouble, here's an extract from section ENR1 GENERAL RULES AND PROCEDURES:
To save you the trouble, here's an extract from section ENR1 GENERAL RULES AND PROCEDURES:
Joined: Oct 2017
Posts: 65
Likes: 0
From: Rosterabuseland
Thanks, this is what I was looking for, surprised it has disappeared from the Jepps, I'm not sure if it's changed, but it seems that "free speed" is ok in Japan; wasn't aware of this - the Jepps always showed it as a "hard" limit (like the US). Appreciate you posting the excerpt.
Thread Starter
Joined: Apr 2008
Posts: 461
Likes: 1
From: A tropical island.
Joined: Feb 2020
Posts: 3
Likes: 0
From: Tokyo
Hello, I am a pilot based in japan.
The speed restriction mentioned in your post remain the same.
It is described in the Jeppsen airway manual "PACIFIC" => AIRTRAFFIC CONTROL=>STATE RULES AND PROCEDURES - FAR EAST=>JAPAN=>Speed Restrictions.
As for the request to exceed the speed limits, controllers are tend to approve such request if the traffic permits recently.
I hope this post might help.
regards,
The speed restriction mentioned in your post remain the same.
It is described in the Jeppsen airway manual "PACIFIC" => AIRTRAFFIC CONTROL=>STATE RULES AND PROCEDURES - FAR EAST=>JAPAN=>Speed Restrictions.
As for the request to exceed the speed limits, controllers are tend to approve such request if the traffic permits recently.
I hope this post might help.
regards,
Joined: Dec 2006
Posts: 922
Likes: 2
From: australia
Interesting, I left 4 years ago and we were always told it was a legislative edict that ATC did not have the authority to permit for normal operations as an earlier poster stated.
Of course emergencies, medical cases etc no problems if declared and requested.
Hopefully things have loosened up.
Another curiosity was the 250kt was the maximum, having done and observed some JCAB checkrides if you were in unstable air and fluctuated anything above 250kts was "you broke the law" stuff and would bring heavy consideration as to whether you passed or failed the checkride.
Cheers.
Of course emergencies, medical cases etc no problems if declared and requested.
Hopefully things have loosened up.
Another curiosity was the 250kt was the maximum, having done and observed some JCAB checkrides if you were in unstable air and fluctuated anything above 250kts was "you broke the law" stuff and would bring heavy consideration as to whether you passed or failed the checkride.
Cheers.
