A Journal of our Travels
| Tare Mass | Empty weight of trailer |
| ATM | Aggregate Trailer Mass - Total Maximum weight of trailer including payload. |
| GTM | Gross Trailer Mass - ATM minus Towball Mass i.e. the weight on the wheels. |
| TBM | Tow Ball Mass - The weight on the tow hitch |
| GVM | Gross Vehicle Mass - The weight of the vehicle plus tow ball mass. |
| GCM | Gross Combination Weight - GVM + GTM. |
For a great explanation of what makes a caravan stable (and unstable) see Collyn Rivers article.
