- Because of the small righting moments the ship will only offer limited resistance to being rolled, causing the ship to be rolled to larger angles of heel. This will increase the risk of water being shipped on deck.
- The ship will be slow to return to the upright and will tend to remain at the extent of the roll for a comparatively long time. This will create greater and more prolonged strain on cargo lashings and increase the risk of cargo shift.
- Rolling to excessive angles of heel is also uncomfortable for the crew and injury may result.
As a guide, a GM of between 4-8% of the ships breadth is desirable. Container ships that have containers stowed on deck may probably be more suited to a GM value on the tender side of these limits to minimize the stresses on deck container lashings.
Typical curves of statical stability for both a stiff and tender ship are shown.
