Enum Speed 

pub enum Speed {
    Knots(u16),
    Kmh(f64),
    Mph(u16),
}

A ground-speed measurement with explicit units.

APRS uses multiple unit conventions depending on context:

• Knots — Mic-E and course/speed extension on wire
• Km/h — SmartBeaconing parameters
• Mph — US weather station display convention

This enum keeps each unit distinct and provides lossless conversions so callers never accidentally mix them.

Variants

Knots(u16)

Nautical miles per hour.

Kmh(f64)

Kilometres per hour (decimal to allow SmartBeaconing thresholds).

Mph(u16)

Statute miles per hour.

Implementations

impl Speed

pub const KNOTS_TO_KMH: f64 = 1.852

Conversion factor: 1 knot = 1.852 km/h.

pub const MPH_TO_KMH: f64 = 1.609_344

Conversion factor: 1 mph = 1.609_344 km/h.

pub fn as_kmh(self) -> f64

Convert to km/h.

pub fn as_knots(self) -> u16

Convert to knots (rounded to nearest integer).

Trait Implementations

impl Clone for Speed

fn clone(&self) -> Speed

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Speed

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Speed

fn eq(&self, other: &Speed) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Speed

impl StructuralPartialEq for Speed