Navman 12 Designer's Manual page 12

Field Type Symbol
Status A
Latitude 1111.11
Longitude yyyyy. yy
Time hhmmss.ss
Defined
field
Variable
X.x
numbers
Fixed HEX
Hh__
field
Variable
Cn C
text
Fixed
Aa__
alpha field
Fixed
number Xx__
field
Fixed text
Cc__
field
Note 1: Spaces may only be used in variable text fields.
Note 2: A negative sign ('–' or 2DHEX) is the first character in a field if the value is negative. The sign is omitted if the value is
positive.
Note 3: All data fields are delimited by a comma (,).
Note 4: Null fields are indicated by no data between two delimiters.
MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Special format fields
Single character field:
A = yes, data valid, warning flag clear
V = no, data invalid, warning flag set
Fixed/variable length field (degrees/minutes.decimal) two fixed digits of degrees, two fixed
digits of minutes, and a variable number of digits for decimal-fraction of minutes
Note: Leading zeros always included for degrees and minutes to maintain fixed length (the
decimal point and associated decimal-fraction are optional if full resolution is not required).
Fixed/variable length field (degrees/minutes.decimal) three fixed digits of degrees, two fixed
digits of minutes and a variable number of digits for decimal-fraction of minutes.
Note: Leading zeros always included for degrees and minutes to maintain fixed length (the
decimal point and associated decimal-fraction are optional if full resolution is not required).
Fixed/variable length field (hours/minutes/seconds.decimal) two fixed digits of hours,
two fixed digits of minutes, two fixed digits of seconds and a variable number of digits for
decimal-fraction of seconds.
Note: Leading zeros always included for hours, minutes, and seconds to maintain fixed
length (the decimal point and associated decimal-fraction are optional if full resolution is not
required).
Some fields are specified to contain pre-defined constants, most often alpha characters.
Such a field is indicated in the NMEA-0183 standard by the presence of one or more valid
characters. The following characters and character strings used to indicate field types are
excluded from the list of allowable characters: 'A', 'a', 'c', 'hh', 'hhmmss.ss', '1111.11', 'x', and
'yyyyy.yy'.
Numeric value fields
Variable length integer or floating point numeric field (optional leading and trailing zeros)
Note: The decimal point and associated decimal-fraction are optional if full resolution is not
required (eg 73.10 = 73.1 = 073.1 = 73).
Fixed length HEX numbers only, most significant bit on the left.
Information fields
Variable length valid character field
Fixed length field of uppercase or lowercase alpha characters
Fixed length field of numeric characters
Fixed length field of valid characters
Table 3-3 NMEA field type summary
Definition
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