> grib_dump -O ice_severity__no_bitsPerValue.grib2
***** FILE: ice_severity__no_bitsPerValue.grib2 
#==============   MESSAGE 1 ( length=179 )                 ==============
1-4       identifier = GRIB
5-6       reserved = MISSING
7         discipline = 0 [Meteorological products (grib2/tables/4/0.0.table) ]
8         editionNumber = 2
9-16      totalLength = 179
======================   SECTION_1 ( length=21, padding=0 )    ======================
1-4       section1Length = 21
5         numberOfSection = 1
6-7       centre = 74 [U.K. Met Office - Exeter (common/c-11.table) ]
8-9       subCentre = 5
10        tablesVersion = 4 [Version implemented on 7 November 2007 (grib2/tables/1.0.table) ]
11        localTablesVersion = 0 [Unknown code table entry () ]
12        significanceOfReferenceTime = 1 [Start of forecast (grib2/tables/4/1.2.table) ]
13-14     year = 2023
15        month = 11
16        day = 6
17        hour = 6
18        minute = 0
19        second = 0
20        productionStatusOfProcessedData = 1 [Operational test products (grib2/tables/4/1.3.table) ]
21        typeOfProcessedData = 1 [Forecast products (grib2/tables/4/1.4.table) ]
======================   SECTION_3 ( length=72, padding=0 )    ======================
1-4       section3Length = 72
5         numberOfSection = 3
6         sourceOfGridDefinition = 0 [Specified in Code table 3.1 (grib2/tables/4/3.0.table) ]
7-10      numberOfDataPoints = 72721
11        numberOfOctectsForNumberOfPoints = 0
12        interpretationOfNumberOfPoints = 0 [There is no appended list (grib2/tables/4/3.11.table) ]
13-14     gridDefinitionTemplateNumber = 0 [Latitude/longitude (Also called equidistant cylindrical, or Plate Carree)  (grib2/tables/4/3.1.table) ]
15        shapeOfTheEarth = 1 [Earth assumed spherical with radius specified by data producer (grib2/tables/4/3.2.table) ]
16        scaleFactorOfRadiusOfSphericalEarth = 0
17-20     scaledValueOfRadiusOfSphericalEarth = 6371229
21        scaleFactorOfEarthMajorAxis = 0
22-25     scaledValueOfEarthMajorAxis = 0
26        scaleFactorOfEarthMinorAxis = 0
27-30     scaledValueOfEarthMinorAxis = 0
31-34     Ni = 601
35-38     Nj = 121
39-42     basicAngleOfTheInitialProductionDomain = 0
43-46     subdivisionsOfBasicAngle = MISSING
47-50     latitudeOfFirstGridPoint = 90000000
51-54     longitudeOfFirstGridPoint = 60000000
55        resolutionAndComponentFlags = 48 [00110000 (grib2/tables/4/3.3.table) ]
56-59     latitudeOfLastGridPoint = 60000000
60-63     longitudeOfLastGridPoint = 210000000
64-67     iDirectionIncrement = 250000
68-71     jDirectionIncrement = 250000
72        scanningMode = 0 [00000000 (grib2/tables/4/3.4.table) ]
======================   SECTION_4 ( length=34, padding=0 )    ======================
1-4       section4Length = 34
5         numberOfSection = 4
6-7       NV = 0
8-9       productDefinitionTemplateNumber = 0 [Analysis or forecast at a horizontal level or in a horizontal layer at a point in time (grib2/tables/4/4.0.table) ]
10        parameterCategory = 19 [Physical atmospheric properties (grib2/tables/4/4.1.0.table) ]
11        parameterNumber = 37 [Unknown code table entry (grib2/tables/4/4.2.0.19.table) ]
12        typeOfGeneratingProcess = 2 [Forecast (grib2/tables/4/4.3.table) ]
13        backgroundProcess = 1
14        generatingProcessIdentifier = 1
15-16     hoursAfterDataCutoff = 0
17        minutesAfterDataCutoff = 0
18        indicatorOfUnitOfTimeRange = 1 [Hour (grib2/tables/4/4.4.table) ]
19-22     forecastTime = 18
23        typeOfFirstFixedSurface = 100 [Isobaric surface (Pa)  (grib2/tables/4/4.5.table) ]
24        scaleFactorOfFirstFixedSurface = 0
25-28     scaledValueOfFirstFixedSurface = 30090
29        typeOfSecondFixedSurface = 255 [Missing (grib2/tables/4/4.5.table) ]
30        scaleFactorOfSecondFixedSurface = MISSING
31-34     scaledValueOfSecondFixedSurface = MISSING
======================   SECTION_5 ( length=21, padding=0 )    ======================
1-4       section5Length = 21
5         numberOfSection = 5
6-9       numberOfValues = 72721
10-11     dataRepresentationTemplateNumber = 0 [Grid point data - simple packing (grib2/tables/4/5.0.table) ]
12-15     referenceValue = 0
16-17     binaryScaleFactor = -10
18-19     decimalScaleFactor = 0
20        bitsPerValue = 0
21        typeOfOriginalFieldValues = 0 [Floating point (grib2/tables/4/5.1.table) ]
======================   SECTION_6 ( length=6, padding=0 )     ======================
1-4       section6Length = 6
5         numberOfSection = 6
6         bitMapIndicator = 255 [A bit map does not apply to this product (grib2/tables/4/6.0.table) ]
======================   SECTION_7 ( length=5, padding=0 )     ======================
1-4       section7Length = 5
5         numberOfSection = 7
======================   SECTION_8 ( length=4, padding=0 )     ======================
1-4       7777 = 7777