{
  "header":{
    "format":"fixed_width",
    "encoding":"ascii"
  },
  "elements":{
        "RH":{
          "description":"Relative humidity",
          "field_length":3,
          "column_type":"int8",
          "valid_max":100,
          "valid_min":0
        },
        "SHIP NO.":{
          "description":"Ship number",
          "field_length":5,
          "column_type":"int16",
          "valid_min":0,
          "valid_max":99999
        },
        "WX":{
          "description":"Present weather",
          "field_length":2,
          "column_type":"key",
          "codetable":"weather_present"
        },
        "CLD TYP I":{
          "description":"Cloud type",
          "field_length":1,
          "column_type":"key",
          "disable_white_strip":true,
          "codetable":"cloud_type"
        },
        "CLD TYP II":{
          "description":"Cloud type",
          "field_length":1,
          "column_type":"key",
          "disable_white_strip":true,
          "codetable":"cloud_type"
        },
        "CLD TYP III":{
          "description":"Cloud type",
          "field_length":1,
          "column_type":"key",
          "disable_white_strip":true,
          "codetable":"cloud_type"
        },
        "SS DIR":{
          "description":"Swell direction",
          "field_length":2,
          "column_type":"key",
          "codetable":"swell_direction"
        },
        "S S C":{
          "description":"Sea/swell combination",
          "field_length":1,
          "column_type":"key",
          "disable_white_strip":true,
          "codetable":"sea_swell_combination"
        },
        "SWL DIR":{
          "description":"Swell direction",
          "field_length":2,
          "column_type":"key",
          "codetable":"swell_direction"
        },
        "T Y P":{
          "description":"Type of swell. Not in this period",
          "field_length":1,
          "column_type":"key",
          "ignore":true
        },
        "P R T":{
          "description":"Port indicator",
          "field_length":1,
          "column_type":"key",
          "disable_white_strip":true,
          "codetable":"port_ind"
        }
      }
}