1) B10 10-degree box Norwegian: input = no corresponding field 2) YR year Norwegian: input = Date (Ship 2.) (a): Add 1800 to the input if necessary. 3) MO month Norwegian: input = Date (Ship 2.) 4) DY day Norwegian: input = Date (Ship 2.) 5) HR hour Norwegian: input = Hour (Ship 3.) (a): YR, MO, DY, and HR are local date and time on input. Local date and time are converted to GMT. Some YR, MO, and DY are necessarily changed during the conversion to GMT. Local times recorded exactly on a western time zone boundary are interpreted to be in the time zone adjacent and eastward from that boundary. [Ref. {lmrlib.01D:rxltut,ixdtnd,rxnddt}] 6) TI time indicator Norwegian: input = no corresponding field (a): If the input of hour (above field) is not missing, set TI = 0 (nearest whole hour). 7) LON longitude Norwegian: input = Longitude (Ship 6.), E/W hemisphere (Ship 7.) (a): Longitudes are converted to the 0 to 360 positive eastward system. 8) LAT latitude Norwegian: input = Latitude (Ship 4.), N/S hemisphere (Ship 5.) (a): Latitudes are converted to the 0 to 90 positive northward, 0 to 90 negative southward system. 9) LI lat/lon indicator Norwegian: input = no corresponding field (a): Set LI = 3 (interpolated) or LI = 4 (degrees and minutes) or LI = 6 (other (refer to metadata)). [Note: LI was set to interpolated if LAT and/or LON was interpolated. LI was set to other if the hemisphere of LAT and/or LON was reversed or if LAT and/or LON was set to missing and then interpolated [1].] 10) DCK deck Norwegian: input = no corresponding field (a): Set DCK = 702 (Norwegian Logbook Collection). 11) SID source ID Norwegian: input = no corresponding field (a): Set SID = 96 (Norwegian Logbook Collection). 12) PT platform type Norwegian: input = no corresponding field (a): Set PT = 5 (ship) 13) QI quality indicator Norwegian: input = no corresponding field 14) DS dup status Norwegian: input = no corresponding field 15) DC dup check Norwegian: input = no corresponding field 16) TC track check Norwegian: input = no corresponding field (a): Set TC = 1 (track checked) 17) PB pressure bias Norwegian: input = no corresponding field 18) DI wind direction indicator Norwegian: input = no corresponding field (a): If the input of wind direction (next field) is not missing, set DI = 3 (16 of 32-point compass). 19) D wind direction Norwegian: input = Wind direction (Ship 12.) (a): Convert Wind direction from 16 directions of the compass to degrees. [Ref. Release 1, Table F2-1] Wind direction D NNE 23 NE 45 ENE 68 E 90 ESE 113 SE 135 SSE 158 S 180 SSW 203 SW 225 WSW 248 W 270 WNW 293 NW 315 NNW 338 N 360 000 361 (calm) V/v and R/r and B/b 362 (variable) 20) WI wind speed indicator Norwegian: input = no corresponding field (a): Set WI = 5 (Beaufort force (based on documentation)). 21) W wind speed Norwegian: input = Wind force (Ship 13.) (a): Convert Wind force in half the Beaufort to the Beaufort "old" midpoint of double (assumed) the Wind force. [Ref. Release 1, Table K5-5] Wind force Beaufort W m/s 0 0 0.0 1 2 2.6 2 4 6.7 3 6 12.3 4 8 19.0 5 10 26.8 6 12 35.0 22) VI visibility indicator Norwegian: input = no corresponding field 23) VV visibility Norwegian: input = no corresponding field 24) WW present weather Norwegian: input = no corresponding field 25) W1 past weather Norwegian: input = no corresponding field 26) W2 second past weather Norwegian: input = no corresponding field 27) SLP sea level pressure Norwegian: input = Barom temp (Ship 8.), Air pressure (Ship 9.), Barometer type (Voyage 6.), Pressure units (Voyage 7.), Barom therm scale (Voyage 8.) (a): If Barometer type is mercury, correct Air pressure for Barom temp and gravity. Correct Air pressure in English inches and hundredths (bp) for Barom temp in whole degrees Fahrenheit (tf): corr = -bp * ( ((0.000101*(tf-32.))-(0.0000102*(tf-62.))) / (1.+0.000101*(tf-32.)) ) [Ref. {lmrlib.01D,fwbptf}] Correct Air pressure in millimeters and tenths (bp) for Barom temp in degrees Celsius and tenths (tc): corr = -bp * ( ((0.0001818-0.0000184)*tc) / (1.+(0.0001818*tc)) ) [Ref. {lmrlib.01D,fwbptc}] Correct Air pressure (bp) for gravity depending on Latitude (rlatr) a = 0.0000059 * (cos(2.0*rlatr)**2) b = 1. - 0.0026373 * cos(2.0*rlatr) c = 980.665 * (a + b) corr = ((c - 980.665)/980.665) * bp [Ref. {lmrlib.01D,fwbpgv}] [Note: If Barometer type was mercury and (1) Pressure units was English inches and Barom therm scale was not Fahrenheit, or (2) Pressure units was millimeters and Barom therm scale was not Celsius, or (3) Barom temp was missing, SLP was set to missing.] (b): Convert Air pressure in English inches and hundreths (in) to millibars and tenths (mb): mb = in * 33.86389 [Ref. {lmrlib.01D,fxeimb}] Convert Air pressure in millimeters and tenths (mm) to millibars and tenths (mb): mb = mm * 1.333224 [Ref. {lmrlib.01D,fxmmmb}] Convert Air pressure in French inches and hundreths (in) to millibars and tenths (mb): mb = fxmmmb(in * 27.069953) [Ref. {lmrlib.01D,fxfimb}] [Note: Barom corrections (Voyage 9.) was not applied because it was not known whether to add or subtract it. Incorrect Pressure units was corrected. Incorrect Barom therm scale was corrected when Barom temp looked Fahrenheit.] 28) T1 temperature indicator Norwegian: input = Air therm scale (Voyage 13.), Sea therm scale (Voyage 18.) Air and/or Sea therm scale T1 1: Fahrenheit 6 = whole degrees Fahrenheit 2: Celsius 0 = degrees Celsius and tenths 3: Reaumur 9 = other (refer to metadata) [Note: For any combination of Celsius, Fahrenheit, or Reaumur T1 was set to other.] 29) AT air temperature Norwegian: input = Air temperature (Ship 10.), Air therm scale (Voyage 13.) (a): Convert Air temperature in whole degrees Fahrenheit (tf) to degrees Celsius and tenths (tc): tc = (5.0/9.0) * (tf - 32.0) [Ref. {lmrlib.01D,fxtftc}] Convert Air temperature in degrees Reaumur and tenths (tr) to degrees Celsius and tenths (tc): tc = (5.0/4.0) * tr [Ref. {lmrlib.01D,fxtrtc}] [Note: Temp melt snow (AT) (Voyage 16.) was not applied because many in Fahrenheit must have been in Celsius or corrections. Incorrect Air therm scale was corrected when Air temperature looked Fahrenheit.] 30) WBT wet bulb temperature Norwegian: input = no corresponding field 31) DPT dew point temperature Norwegian: input = no corresponding field 32) SST sea surface temperature Norwegian: input = Sea surf temp (Ship 11.), Sea therm scale (Voyage 18.) (a): Convert Sea surf temp in whole degrees Fahrenheit (tf) to degrees Celsius and tenths (tc): tc = (5.0/9.0) * (tf - 32.0) [Ref. {lmrlib.01D,fxtftc}] Convert Sea surf temp in degrees Reaumur and tenths (tr) to degrees Celsius and tenths (tc): tc = (5.0/4.0) * tr [Ref. {lmrlib.01D,fxtrtc}] [Note: Temp melt snow (ST) (Voyage 20.) was not applied because many in Fahrenheit must have been in Celsius or corrections. Incorrect Sea therm scale was corrected when Sea surf temp looked Fahrenheit.] 33) SI sea surface temperature method indicator Norwegian: input = Measure method (Voyage 21.) Measure method SI 1: Bucket 0 = bucket 34) N total cloud amount Norwegian: input = Cloud cover (Ship 14.) (a): Convert Cloud cover in tenths to oktas. [Ref. TDF-11 Reference Manual, Scale 7] Cloud cover N 0 0 1 1 2 2 3 2 4 3 5 4 6 5 7 6 8 6 9 7 10 8 35) NH lower cloud amount Norwegian: input = no corresponding field 36) CL low cloud type Norwegian: input = no corresponding field 37) HI cloud height indicator Norwegian: input = no corresponding field 38) H cloud height Norwegian: input = no corresponding field 39) CM middle cloud type Norwegian: input = no corresponding field 40) CH high cloud type Norwegian: input = no corresponding field 41) WD wave direction Norwegian: input = no corresponding field 42) WP wave period Norwegian: input = no corresponding field 43) WH wave height Norwegian: input = no corresponding field 44) SD swell direction Norwegian: input = no corresponding field 45) SP swell period Norwegian: input = no corresponding field 46) SH swell height Norwegian: input = no corresponding field 47) C1 country code Norwegian: input = no corresponding field 48) C2 second country code Norwegian: input = no corresponding field 49) SC ship course Norwegian: input = no corresponding field 50) SS ship speed Norwegian: input = no corresponding field 51) A barometric tendency Norwegian: input = no corresponding field 52) PPP amount of SLP change Norwegian: input = no corresponding field 53) IS ice accretion Norwegian: input = no corresponding field 54) ES ice thickness Norwegian: input = no corresponding field 55) RS ice accretion rate Norwegian: input = no corresponding field 56) II ID indicator Norwegian: input = no corresponding field (a): Set II = 10 (composite information from early ship data) 57-64) ID(8) ID/call sign Norwegian: input = Ship name (Voyage 2.) (a): Map lower case characters to upper case. 65) OS observation source Norwegian: input = no corresponding field 66) OP observation platform Norwegian: input = no corresponding field 67) T2 second temperature indicator Norwegian: input = no corresponding field 68) IX station/weather indicator Norwegian: input = no corresponding field 69) WX wave period indicator Norwegian: input = no corresponding field 70) SX swell period indicator Norwegian: input = no corresponding field 71) IRD IMM receipt date Norwegian: input = no corresponding field 72) A6 allowance 6 flag Norwegian: input = no corresponding field {3. Contents of supplemental attachment (Attm4)} Norwegian: input = Control number Ship(1.) Ship name Voyage(2.) Barometer type Voyage(6.) Pressure units Voyage(7.) Barom therm scale Voyage(8.) Barom temp Ship(8.) Barom corrections Voyage(9.) Date last barom corr Voyage(10.) Air therm scale Voyage(13.) Temp melt snow (AT) Voyage(16.) Sea therm scale Voyage(18.) Temp melt snow (ST) Voyage(20.) Weather Ship(15.) Sea state Ship(16.) Remarks Voyage(26.) Remarks Ship(17.) Place of exam (B) Voyage(11.) Port of compare (B) Voyage(12.) Place of exam (AT) Voyage(15.) Place of exam (ST) Voyage(19.) Voyage from Voyage(3.) Voyage to Voyage(4.) Air therm location Voyage(14.) Registrators notes Voyage(27.) Registrators note Ship(20.) Registration date Ship(19.) Registrator Ship(18.) Ocean crossed Voy(5.) Each of the above fields was terminated with '}' (not a fixed width format). The attachment was truncated, possibly in the middle of a field (indicated by no terminating '}'), when it became full. {4. Notes} [1] No ship observations (including unproofread observations with control numbers 6136, 6265, 6342) were removed. Ship observations with incorrect control numbers were aligned with correct voyage headers. Corrections to year, month, day, hour, and to missing hemispheres were implied from context. Latitudes or longitudes with minutes greater than or equal to 60 or which were otherwise illogical were set to missing and then interpolated. Observations where a ship traveled greater than or equal to 5.5 degrees per day (longitudes weighted by the cosine of their latitudes) were visually inspected. Hemispheres were then reversed or latitudes or longitudes were set to missing and then interpolated. Hemispheres were also reversed when two people agreed they should be. Observations with incorrect latitude and longitude for New York City were corrected.