Does having a keel imply that the ship is self-righting? Like, completely submerged, does it also guarantee that the ship floats back to the top, oriented?
Yes. They are weighted with lead, and help keep the boat topside-up. They are also a critical component to the functioning of sail propulsion. The keel works in a kind of opposition to the sail to propel the boat forward, similar to how squeezing an ice cube between your thumb and finger will ‘squirt’ it out in a direction perpendicular to those forces.
But also no, if it’s capsized, the boat may right itself in time before it floods to a point where it sinks.
A fully submerged boat will not bob to the surface. The keel adds stability and (counter)weight, but negative buoyancy - what keeps the boat afloat is the air in the hull.
Once it’s fully submerged, there’s nothing pulling it up (unless you have some seriously good (and closed!) hatches…
Does having a keel imply that the ship is self-righting? Like, completely submerged, does it also guarantee that the ship floats back to the top, oriented?
Yes. They are weighted with lead, and help keep the boat topside-up. They are also a critical component to the functioning of sail propulsion. The keel works in a kind of opposition to the sail to propel the boat forward, similar to how squeezing an ice cube between your thumb and finger will ‘squirt’ it out in a direction perpendicular to those forces.
But also no, if it’s capsized, the boat may right itself in time before it floods to a point where it sinks.
A fully submerged boat will not bob to the surface. The keel adds stability and (counter)weight, but negative buoyancy - what keeps the boat afloat is the air in the hull.
Once it’s fully submerged, there’s nothing pulling it up (unless you have some seriously good (and closed!) hatches…