playing with named derived units to allow knots to be deduced from

nautical miles & hours but be called knot instead of mi(naut) / h

src/include/units/physical/fps/energy.h

@@ -35,7 +35,7 @@ struct foot_poundal : unit<foot_poundal> {};
 struct dim_energy : physical::dim_energy<dim_energy, foot_poundal, dim_force, dim_length> {};
 
 // https://en.wikipedia.org/wiki/Foot-pound_(energy)
-struct foot_pound_force : named_deduced_unit<foot_pound_force, dim_energy, pound_force, foot> {};
+struct foot_pound_force : noble_deduced_unit<foot_pound_force, dim_energy, pound_force, foot> {};
 
 
 

src/include/units/physical/fps/pressure.h

@@ -39,7 +39,7 @@ using pressure = quantity<dim_pressure, U, Rep>;
 
 struct pound_force_per_foot_sq : named_scaled_unit<pound_force_per_foot_sq, "lbf ft2", si::prefix, ratio<32'174'049, 1'000'000>, poundal_per_foot_sq> {};
 
-// struct pound_force_per_foot_sq : named_deduced_unit<pound_force_per_foot_sq, dim_pressure, pound_force, square_ft> {};
+// struct pound_force_per_foot_sq : noble_deduced_unit<pound_force_per_foot_sq, dim_pressure, pound_force, square_ft> {};
 
 struct pound_force_per_inch_sq : named_scaled_unit<pound_force_per_inch_sq, "psi", si::prefix, ratio<1, 144>, pound_force_per_foot_sq> {};
 

src/include/units/physical/fps/speed.h

@@ -37,9 +37,9 @@ using speed = quantity<dim_speed, U, Rep>;
 
 struct mile_per_hour : deduced_unit<mile_per_hour, dim_speed, mile, hour>{};
 
-struct nautical_mile_per_hour : deduced_unit<nautical_mile_per_hour, dim_speed, nautical_mile, hour>{};
+struct nautical_mile_per_hour :named_deduced_derived_unit<nautical_mile_per_hour, dim_speed, "knot", no_prefix, nautical_mile, hour>{};
 
-struct knot : alias_unit<nautical_mile_per_hour, "knot", si::prefix> {};
+struct knot : alias_unit<nautical_mile_per_hour, "knot", no_prefix> {};
 
 
 inline namespace literals {