Taku Harbor Seaplane Base to Alitak Seaplane Base A43 → ALZ
654 nautical miles (753 statute miles) west on a straight line, true course 272°, about 244° magnetic at the departure end (variation 28E). At 120 knots that is 6 h 10 min at the quickest height in today's winds (4,500 ft, a 14-knot headwind), arriving about 3:28 am AKDT (11:28 UTC), after sunset at the destination. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 57 flights in the DOT's last twelve reported months, the route's page.
The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words
Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.
Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of
No SIGMET or AIRMET covers any part of this route right now.
A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from A43.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B737 descending, 16 nm north, 7:53 pm AKDT (03:53 UTC): remarks: during the descent runway 8 low-level wind shear a 10-knot loss of airspeed jnut akfss. At the departure end, 16 nm north of the line.
as filed, and in English
JNU UUA /OV JNU /TM 0353 /FLUNKN /TP B737 /RM DURD RY8 LLWS +/-10KTS JNUT AKFSS
- Report
- an urgent report filed through JNU
- Where
- over JNU
- Time
- 03:53 UTC
- Height
- height not given
- Aircraft
- B737
- Remarks
- during the descent runway 8 low-level wind shear a 10-knot loss of airspeed jnut akfss
- B737 descending, 16 nm north, 8:53 pm AKDT (04:53 UTC): light chop turbulence, remarks: during the descent runway 8 akfss. At the departure end, 16 nm north of the line.
as filed, and in English
JNU UA /OV JNU /TM 0453 /FLUNKN /TP B737 /TB LGT CHOP /RM DURD RY8 AKFSS
- Report
- a routine report filed through JNU
- Where
- over JNU
- Time
- 04:53 UTC
- Height
- height not given
- Aircraft
- B737
- Turbulence
- light chop
- Remarks
- during the descent runway 8 akfss
Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 UTC · at 120 knots true airspeed
The westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 4 forecast points nearest it (JNU, YAK, MDO, ADQ). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 4,500 ft | 240° at 16 kt | +14 kt | 106 kt | 6 h 10 min | 3:28 am AKDT (11:28 UTC) | |
| 6,500 ft | 240° at 18 kt | +16 kt | -5 °C | 104 kt | 6 h 17 min | 3:35 am AKDT (11:35 UTC) |
| 8,500 ft | 240° at 19 kt | +17 kt | -10 °C | 103 kt | 6 h 21 min | 3:39 am AKDT (11:39 UTC) |
| 10,500 ft | 240° at 21 kt | +19 kt | -14 °C | 101 kt | 6 h 29 min | 3:47 am AKDT (11:47 UTC) |
| 12,500 ft | 240° at 23 kt | +21 kt | -18 °C | 99 kt | 6 h 36 min | 3:54 am AKDT (11:54 UTC) |
| 14,500 ft | 240° at 27 kt | +24 kt | -22 °C | 96 kt | 6 h 49 min | 4:07 am AKDT (12:07 UTC) |
| 16,500 ft | 240° at 31 kt | +27 kt | -25 °C | 93 kt | 7 h 02 min | 4:20 am AKDT (12:20 UTC) |
| 18,000 ft FL180 | 240° at 33 kt | +29 kt | -28 °C | 91 kt | 7 h 11 min | 4:29 am AKDT (12:29 UTC) |
| 24,000 ft FL240 | 240° at 47 kt | +41 kt | -37 °C | 79 kt | 8 h 17 min | 5:35 am AKDT (13:35 UTC) |
| 30,000 ft FL300 | 240° at 62 kt | +56 kt | -45 °C | 64 kt | 10 h 13 min | 7:31 am AKDT (15:31 UTC) |
| 34,000 ft FL340 | 240° at 62 kt | +57 kt | -48 °C | 63 kt | 10 h 23 min | 7:41 am AKDT (15:41 UTC) |
| 39,000 ft FL390 | 240° at 63 kt | +58 kt | -47 °C | 62 kt | 10 h 33 min | 7:51 am AKDT (15:51 UTC) |
Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.
The forecast points as issued
| Point | From | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| JNU | used from 0 nm out; 18 nm from the line | 180/24 | 230/31 0° | 230/32 -6° | 230/41 -12° | 240/62 -21° | 240/73 -32° | 240/94 -45° | 250/94 -50° | 250/78 -50° |
| YAK | used from 99 nm out; 100 nm from the line | 210/8 | 240/15 -5° | 250/20 -11° | 250/25 -18° | 240/49 -27° | 240/60 -35° | 240/78 -45° | 240/74 -47° | 240/68 -46° |
| MDO | used from 297 nm out; 115 nm from the line | 250/15 | 240/14 -5° | 230/15 -11° | 230/15 -18° | 230/14 -29° | 230/29 -40° | 240/50 -46° | 240/53 -47° | 240/58 -46° |
| ADQ | used from 446 nm out; 121 nm from the line | 250/23 | 250/18 -5° | 240/17 -12° | 240/17 -19° | 240/19 -30° | 240/34 -39° | 250/39 -45° | 250/42 -49° | 240/54 -47° |
The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch
| Airport | Where | Conditions | Wind | Visibility | Ceiling | Elevation | Reported |
|---|---|---|---|---|---|---|---|
| A43 Taku Harbor, AK | departure | no report just now | 0 ft | ||||
| JNU Juneau, AK | 20 nm out, 16 nm north of the line, tower | marginal VFR Sky: a broken layer at 1,900 feet, overcast at 2,600 feet Weather: light rain | from the east-southeast (120°) at 14 knots, gusting to 24 | 10+ mi | 1,900 ft | 25 ft | 04:53 UTC |
| ELV Elfin Cove, AK | 69 nm out, 7 nm northwest of the line | no report just now | 0 ft | ||||
| ALZ Lazy Bay, AK | destination | no report just now | 0 ft |
The highest airport on this list sits at 25 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At ALZ when you get there the forecast at the estimated arrival, 3:28 am AKDT (11:28 UTC)
ALZ has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Daylight
Sunset at A43 5:59 pm AKDT (01:59 UTC), at ALZ 7:22 pm AKDT (03:22 UTC) (civil twilight ends 8:00 pm AKDT (04:00 UTC)). At 120 knots the arrival at ALZ is before sunrise there (8:43 am AKDT (16:43 UTC)).
Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.
Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads
Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Taku Harbor Seaplane Base, Alitak Seaplane Base.