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    FW: FW: mv Amsterdam
    From: Irv Haworth
    Date: 2009 Nov 21, 13:11 -0800
    Obs Query

     

     

    As previously noted I will probably conclude this post with this last reply I have received, as I fear I’m beating a dead horse. Fortunately I am comforted with the fact “my mind is made up…so don’t confuse me with more … hiΒ  …hi )

    73 Irv

     

    From: Robert .
    Sent: Friday, November 20, 2009 8:40 AM
    To: Irv Haworth
    Cc: Scott D .Subject: Re: FW: mv Amsterdam

     

    Irv,

    thanks for bringing this to our attention.  I cannot address whether or not it should be SOA or SOG, but have forwarded that portion over to the Sailwx webmaster for review.

    You were correct in that the ship erroneously jumped from Eastern to Western hemispheres on 10/29 - 18UTC observation.

    here is their raw observation in standard WMO FM-13 code.  Looking at the third group past the call sign, you see that they encoded a "5" instead of a "3" for quadrant of the globe (51314 should have been 31314). You can refer to page 2-9 of the linked Observing handbook No 1 to see the coding rules.

    If you look at the 22244 group in the same 18UTC observation, the 3 hourly average ships course was coded as a 4 (southerly) with a 3 hourly ships speed average also a 4 (16 to 20 knots). (refer to page 2-75 in the Handbook No. 1)

    In the VOS program, we ask the ships to use SOG values to determine their 3 hrly speed average as well as their true wind from apparent.


    Most ships in the US VOS program use our AMVER/SEAS electronic logbook to encode their observation.  SEAS has a QC check to catch inadvertent typos from E to W or N to S entries.  This particular ship prefers to use the TURBO Electronic Software from the Netherlands VOS program and I have just verified with them that Turbo also has this QC check in place.  For more detailed information regarding the Turbo QC checks please see the link below.

    As this ship submits their observations via email & our communication servers only hold a few days worth of submission, we cannot see the ships initial input to verify that they submitted a Typo or if our system (which is just a pass through type) did something to "tweak" this one individual observation.

    Obs Query

    report

    PBAD 29134 99268 31534 41/// /1019 10215 20161 40231 7//// 8//// 22233 00250 2//// 3//// 4//// 5//// 80180

    PBAD 29184 99270 51538 41798 51314 10210 20210 40211 55000 70211 85070 22244 00200 20202 330// 40502 5//// 80210

    PBAD 29194 99283 31538 41/98 31416 10210 20164 40216 55005 701// 8//// 22244 00250 21001 3//// 4//// 5//// 80180

    PBAD 29224 99290 31538 41/98 51212 10230 20169 40233 52017 70322 8//// 22244 00250 20301 3//// 4//// 5//// 80190

    PBAD 30124 99324 31528 41298 20408 10195 20184 40230 50000 70200 81107 22243 00220 20201 309// 40302 5//// 80188


    .Hope this helps,

    Luke


    -- 
    Robert .

    Hi Irv,

    I'm not the best person to answer questions about SOA (speed of advance) (or speed over ground calculations), but offer the following information in case it is useful:

    This website describes in general terms how the international Voluntary Observing Ship (VOS) programme works:
         http://www.bom.gov.au/jcomm/vos/vos.html
    including data elements generally reported by the various types of VOS, and that "Ship's observations are made at the standard synoptic hours of 0000, 0600, 1200 and 1800 UTC and are sent to a meteorological service as soon as they are made, either by radio telephony to a coast radio station, by telex over radio, or by INMARSAT-C."

    My understanding is that SOA (or nautical miles run) data are not transmitted from the ships in the real-time (GTS) ship messages, in which case those quantities as displayed by Sailwx must be calculated elsewhere (perhaps by Sailwx by comparing successive individual marine reports). Individual GTS ship reports include reported latitude, longitude, time, and ship's course information, and there can certainly be errors in those elements, due to a original reporting problems or other downstream factors.

    Responding to your original question 3), the above referenced webpage also describes how: "The quality of VOS reports is monitored by several major meteorological centres, primarily the Met Office, United Kingdom. Results of this monitoring are compiled and distributed at monthly and six-monthly intervals to PMOs, who are expected to take follow-up actions to correct deficiencies."  Probably many erroneous data will be detected after original receipt at national meteorological centers through their QC measures and removed/flagged in the database (or possibly corrected) e.g. for weather forecasting applications. I think the quality of observations may vary considerably depending on the shipboard equipment (e.g., electronic logbooks can result in improved data quality).

    Robert Luke (cc'd), NOAA's VOS Program Manager, may be able to comment further on some of your questions. (Also, Luke I believe has been in touch with the Sailwx firm.) So I have attached your two previous messages relating to the Amsterdam's positions etc. for Luke's information.

    Hope this helps. Regards,  -Scott


    On 11/18/09 11:14 AM, Irv Haworth wrote:

    Hi Scott

    Seems that mv Amsterdam is not reporting the correct date given its position i.e. it’s running a day late!

    Kind regards

    Irv

    WELCOME BACK

     

    From: Irv Haworth [mailto:irvhaworth{at}shaw.ca]
    Sent: Monday, November 16, 2009 12:14 PM
    To: Navlist (navlist@fer3.com)
    Subject: mv Amsterdam

     

    The mystery ship reports..The dates /times/hemisphere do not jibe. The ships is now NE of NZ. Aside from SOA issue the date/time ,given its position are out of kilter, given the date (time)My     QTH at  Ξ» 123Β° W at about 12 noon PST  (ship is underway at 18 kts)

    Any comments’

    Fido (aka Irvin)

     

     

     

     

    Last reported at 2009-Nov-16 18:00 UTC. Time now 2009-Nov-16 19:48 UTC.
    Position S 31Β°54', E 176Β°36'.

     

    Last reported at 2009-Nov-16 18:00 UTC. Time now 2009-Nov-16 20:02 UTC.
    Position S 31Β°54', E 176Β°36'.

     

     

    -- 
    ___________________________________
    Scott Woodruff, NOAA/ESRL (PSD3)
    325 Broadway; Boulder, CO 80305 USA
    phone: +1 303-497-6747 (fax: -6181)
    Scott.D.Woodruff{at}noaa.gov
    ___________________________________
    Β  

     


     

    Subject:

    Amsterdam - 30Oct.mht

    From:

    Irv Haworth <irvhaworth{at}shaw.ca>

    Date:

    Thu, 05 Nov 2009 15:41:26 -0800

    .

    Hi Scott

    Further to query SOA vs SMG or SOG , I thought it best if you looked at the actual data (?)  that was sent by the ship Amsterdam to WMO. Specifically look at the data for 29 Oct,2009. Aside from setting speed records …hi…hi… what are checks/balances in system aboard the ship and perhaps more importantly at WMO station ?

    Hope I’m not a pain

    Kind regards

    Irv

     

    Amsterdam (callsign PBAD)

    Track history (hours):

     

    Tides

    Stations

    Pressure

    Air Temp

    Water Temp

    Wind Speed

    Wind Dir

    Wave Height

    Ship positions

    Amsterdam

    Operator: Holland America Line

    Last reported at 2009-Oct-30 22:50 UTC. Time now 2009-Oct-30 23:35 UTC.
    Position S 33Β°52', E 151Β°13'.

    Notes

    date/time

    lat

    lon

    naut. miles run

    SOA

    wind from

    knots

    barom.

    wave height

    air temp

    dew point

    water temp

    2009-Oct-30 22:50

    S 33Β°52'

    E 151Β°13'

    0

    0.0

    2009-Oct-30 21:44

    S 33Β°52'

    E 151Β°13'

    0

    0.0

    2009-Oct-30 21:00

    S 33Β°52'

    E 151Β°13'

    0

    0.7

    2009-Oct-30 20:28

    S 33Β°51'

    E 151Β°13'

    8

    8.8

    2009-Oct-30 19:32

    S 33Β°49'

    E 151Β°23'

    2

    10.3

    2009-Oct-30 19:20

    S 33Β°48'

    E 151Β°24'

    11

    12.9

    2009-Oct-30 18:30

    S 33Β°40'

    E 151Β°33'

    85

    24.4

    2009-Oct-30 15:00

    S 32Β°48'

    E 152Β°54'

    25

    8.2

    040

    8

    1023.0

    0.5

    19.5

    18.4

    22.0

    2009-Oct-30 12:00

    S 32Β°24'

    E 152Β°48'

    210

    15.0

    040

    8

    1023.0

    0.5

    19.5

    18.4

    22.0

    2009-Oct-29 22:00

    S 29Β°00'

    E 153Β°48'

    42

    14.0

    120

    12

    1023.3

    0.5

    23.0

    16.9

    25.0

    2009-Oct-29 19:00

    S 28Β°18'

    E 153Β°48'

    2786

    2786.0

    140

    16

    1021.6

    0.5

    21.0

    16.4

    25.0

    2009-Oct-29 18:00

    S 27Β°00'

    W 153Β°48'

    2825

    565.0

    130

    14

    1021.1

    1.0

    21.0

    21.0

    20.0

    2009-Oct-29 13:00

    S 26Β°48'

    E 153Β°24'

    28

    1.6

    100

    19

    1023.1

    21.5

    16.1

    25.0

    2009-Oct-28 19:00

    S 27Β°06'

    E 153Β°48'

    177

    13.6

    100

    18

    1021.3

    1.0

    21.0

    14.7

    25.0

    2009-Oct-28 06:00

    S 24Β°12'

    E 153Β°12'

    110

    13.8

    120

    31

    1017.4

    3.0

    23.1

    19.9

    25.0

    2009-Oct-27 22:00

    S 22Β°48'

    E 151Β°54'

    45

    14.9

    090

    26

    1018.6

    2.0

    24.0

    24.0

    26.0

    2009-Oct-27 19:00

    S 22Β°18'

    E 151Β°18'

    312

    14.9

    100

    31

    1014.0

    2.5

    24.0

    24.0

    26.0

    2009-Oct-26 22:00

    S 18Β°54'

    E 147Β°06'

    38

    12.6

    070

    16

    1014.0

    1.0

    25.0

    25.0

    27.0

    2009-Oct-26 19:00

    S 18Β°18'

    E 146Β°54'

    79

    15.8

    080

    12

    1012.0

    1.0

    24.0

    24.0

    27.0

    2009-Oct-26 14:00

    S 17Β°00'

    E 147Β°06'

    25

    12.5

    060

    17

    1011.0

    24.9

    24.2

    27.0

    2009-Oct-26 12:00

    S 16Β°42'

    E 146Β°48'

    64

    3.6

    050

    19

    1010.8

    25.2

    24.9

    27.0

    2009-Oct-25 18:00

    S 16Β°54'

    E 145Β°42'

    0

    0.0

    180

    7

    1011.2

    25.0

    2009-Oct-25 17:00

    S 16Β°54'

    E 145Β°42'

    0

    0.0

    180

    7

    1011.2

    25.0

    2009-Oct-25 15:00

    S 16Β°54'

    E 145Β°42'

    184

    9.2

    180

    9

    1011.8

    25.0

    2009-Oct-24 19:00

    S 17Β°06'

    E 148Β°54'

    79

    19.8

    120

    15

    1012.8

    23.1

    20.3

    26.0

    2009-Oct-24 15:00

    S 17Β°54'

    E 150Β°00'

    17

    16.6

    100

    18

    1013.0

    1.0

    23.0

    19.9

    2009-Oct-24 14:00

    S 18Β°06'

    E 150Β°12'

    148

    18.6

    110

    17

    1014.0

    1.5

    24.0

    21.0

    25.0

    2009-Oct-24 06:00

    S 18Β°00'

    E 152Β°48'

    297

    18.6

    130

    19

    1012.1

    2.5

    25.0

    25.0

    26.0

    2009-Oct-23 14:00

    S 17Β°48'

    E 158Β°00'

    34

    17.1

    120

    24

    1014.0

    1.5

    24.0

    24.0

    26.0

    2009-Oct-23 12:00

    S 17Β°48'

    E 158Β°36'

    34

    17.1

    120

    24

    1014.0

    2.0

    24.0

    24.0

    26.0

    2009-Oct-23 10:00

    S 17Β°48'

    E 159Β°12'

    297

    18.6

    120

    24

    1014.0

    2.0

    24.0

    24.0

    26.0

    2009-Oct-22 18:00

    S 17Β°42'

    E 164Β°24'

    63

    21.0

    140

    25

    1013.2

    24.5

    24.4

    26.0

    2009-Oct-22 15:00

    S 17Β°42'

    E 165Β°30'

    34

    17.1

    130

    21

    1013.5

    25.0

    25.0

    2009-Oct-22 13:00

    S 17Β°42'

    E 166Β°06'

    51

    17.1

    110

    23

    1015.0

    2.0

    25.0

    25.0

    27.0

    2009-Oct-22 10:00

    S 17Β°42'

    E 167Β°00'

    155

    7.7

    110

    20

    1015.7

    1.0

    25.0

    25.0

    25.0

    2009-Oct-21 14:00

    S 17Β°54'

    E 169Β°42'

    35

    17.4

    120

    18

    1014.6

    1.5

    24.5

    23.8

    2009-Oct-21 12:00

    S 18Β°00'

    E 170Β°18'

    183

    15.3

    130

    25

    1015.0

    2.0

    24.0

    24.0

    2009-Oct-21 00:00

    S 18Β°18'

    E 173Β°30'

     

     

    150

    25

    1015.5

    1.5

    23.9

    23.9

    26.0

    Dump ship's entire track history

     



     

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