Method for determining the inclination of an object in a fixed frame of reference (X, Y, Z) relative to the direction of the Earth's gravity field, characterized in that the method comprises: - the supply of a plurality of accelerometers (A1,...AN) numbering at least three, rigidly linked by the object and distributed over a circle, each of these accelerometers being suitable for measuring an acceleration in a measurement direction (vj), the respective measurement directions of at least two of said accelerometers being non-colinear, the measurement direction of each of said accelerometers being defined by the radius linking this accelerometer to the centre of the circle; - the measurement, by said accelerometers, of the components of the Earth's gravity field along said measurement directions, this measurement providing, for each of said directions, a measurement value, denoted m j for a measurement direction of index i; - the resolution of the following matrix equation to determine the inclination Φ of the object relative to the frame of reference: M = A cos φ − sin φ sin η − sin φ cos η with M being the vector whose ith component is defined by the measurement m j, for the measurement directions defined for each of said accelerometers by the radius linking this accelerometer to the centre of the circle, A being a matrix defined by the measurement directions of the accelerometers in a frame of reference attached to the object, and η being an angle of rotation of this attached frame of reference relative to the fixed frame of reference, said accelerometers exhibiting a Gaussian and centred measurement statistical noise, the resolution comprising the minimization of a criterion L(Φ, η) defined by the following equation: L θ, η = sin φ f _ η − M T × Γ − 1 _ × sin φ f _ η − M with f (η) being a vector whose ith component is equal to -sin(α i +η), with α i being the positioning angle, about an axis normal to said circle and passing through its centre, of the accelerometer of index i relative to one of said accelerometers taken as a reference, and with Γ being a covariance matrix corresponding to the measurement statistical noises of the accelerometers for said measurement directions. - the supply of a plurality of accelerometers (A1,...AN) numbering at least three, rigidly linked by the object and distributed over a circle, each of these accelerometers being suitable for measuring an acceleration in a measurement direction (vj), the respective measurement directions of at least two of said accelerometers being non-colinear, the measurement direction of each of said accelerometers being defined by the radius linking this accelerometer to the centre of the circle; - the measurement, by said accelerometers, of the components of the Earth's gravity field along said measurement directions, this measurement providing, for each of said directions, a measurement value, denoted m j for a measurement direction of index i; - the resolution of the following matrix equation to determine the inclination Φ of the object relative to the frame of reference: M = A cos φ − sin φ sin η − sin φ cos η with M being the vector whose ith component is defined by the measurement m j, for the measurement directions defined for each of said accelerometers by the radius linking this accelerometer to the centre of the circle, A being a matrix defined by the measurement directions of the accelerometers in a frame of reference attached to the object, and η being an angle of rotation of this attached frame of reference relative to the fixed frame of reference, said accelerometers exhibiting a Gaussian and centred measurement statistical noise, the resolution comprising the minimization of a criterion L(Φ, η) defined by the following equation: L θ, η = sin φ f _ η − M T × Γ − 1 _ × sin φ f _ η − M with f (η) being a vector whose ith component is equal to -sin(α i +η), with α i being the positioning angle, about an axis normal to said circle and passing through its centre, of the accelerometer of index i relative to one of said accelerometers taken as a reference, and with Γ being a covariance matrix corresponding to the measurement statistical noises of the accelerometers for said measurement directions.