Class: NMEAPlus::Message::NMEA::SNC

Inherits:
NMEAMessage show all
Defined in:
lib/nmea_plus/message/nmea/snc.rb

Overview

SNC - Navigation Calculation Basis Basis for navigation calculations, Great Circle or Rhumb Line.

Limited utility, no recommended replacement

Instance Attribute Summary collapse

Attributes inherited from NMEAMessage

#message_type, #talker

Attributes inherited from Base

#checksum, #data_type, #fields, #interpreted_data_type, #message_number, #next_part, #original, #payload, #prefix, #total_messages

Method Summary

Methods inherited from NMEAMessage

_10_boolean, _av_boolean

Methods inherited from Base

_float, _hex_to_integer, #_highest_contiguous_index, _integer, _interval_hms, _string, _utc_date_time, _utctime_hms, #add_message_part, #all_checksums_ok?, #all_messages_received?, #calculated_checksum, #checksum_ok?, degrees_minutes_to_decimal, field_reader, #highest_contiguous_index, nsew_signed_float

Instance Attribute Details

#calculation_basis ⇒ Symbol (readonly)

Basis for navigation calculations, Great Circle or Rhumb Line

Returns:

  • (Symbol) 


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# File 'lib/nmea_plus/message/nmea/snc.rb', line 15

def calculation_basis
  case @fields[1]
  when 'G' then :great_circle
  when 'R' then :rhumb_line
  end
end

#calculation_basis_description ⇒ String (readonly)

Description of basis for navigation calculations

Returns:

  • (String) 


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# File 'lib/nmea_plus/message/nmea/snc.rb', line 25

def calculation_basis_description
  case calculation_basis
  when :great_circle then "Great Circle"
  when :rhumb_line then "Rhumb Line"
  end
end