Method of lowering an object from a crane vessel into the sea, wherein use is made of a crane vessel comprising a hull and a crane, wherein the crane comprises: - a stationary pedestal, mounted to or formed integral with the hull of the crane vessel; - a crane housing that is adapted to slew relative to the pedestal about a vertical rotation axis, - a boom, comprising an inner end which is connected pivotably about a horizontal pivot axis to the crane housing, allowing an up-and-down movement of the boom, and comprising a departing sheave (S3; S4), - a luffing device extending between the boom and the crane housing, adapted to position the boom and actuate the up-and-down movement of the boom, - an object suspension device to which an object is connectable, - a hoist assembly which comprises a hoist winch and an associated hoisting cable, the hoisting cable extending from the winch, via a departing sheave on the boom, to the object suspension device, such that upon actuation of the hoist winch the object suspension device can be raised and lowered, wherein the one or more portions of the hoist cable between the boom and the object suspension device form one or more suspension cable parts, and wherein the hoisting cable is provided as a multiple fall cable; wherein a hoist cable retention device is provided on the boom, and in that the hoisting cable comprises one or more first suspension cable parts extending between the object suspension device and a radially outward location of the boom, and one or more second suspension cable parts extending between the objection suspension device and a radially inward location, such that the first and second suspension cable parts extend at V-shape with respect to each other, at an angle of preferably between 20 and 60°, characterized in that the angle between the first and second suspension cable parts is adjustable, at a given position of the inner end of the boom and the object suspension device, the method comprising the following steps: - positioning the object suspension device above the object, - engaging the object by the object suspension device and actuating the hoist winch to lift the object, - positioning the object in an overboard position by slewing the crane housing and/ or actuating the luffing device, - lowering the object into the sea by actuating the hoist winch, - enlarging the angle between the first and second suspension cable parts. - a stationary pedestal, mounted to or formed integral with the hull of the crane vessel; - a crane housing that is adapted to slew relative to the pedestal about a vertical rotation axis, - a boom, comprising an inner end which is connected pivotably about a horizontal pivot axis to the crane housing, allowing an up-and-down movement of the boom, and comprising a departing sheave (S3; S4), - a luffing device extending between the boom and the crane housing, adapted to position the boom and actuate the up-and-down movement of the boom, - an object suspension device to which an object is connectable, - a hoist assembly which comprises a hoist winch and an associated hoisting cable, the hoisting cable extending from the winch, via a departing sheave on the boom, to the object suspension device, such that upon actuation of the hoist winch the object suspension device can be raised and lowered, wherein the one or more portions of the hoist cable between the boom and the object suspension device form one or more suspension cable parts, and wherein the hoisting cable is provided as a multiple fall cable; wherein a hoist cable retention device is provided on the boom, and in that the hoisting cable comprises one or more first suspension cable parts extending between the object suspension device and a radially outward location of the boom, and one or more second suspension cable parts extending between the objection suspension device and a radially inward location, such that the first and second suspension cable parts extend at V-shape with respect to each other, at an angle of preferably between 20 and 60°, characterized in that the angle between the first and second suspension cable parts is adjustable, at a given position of the inner end of the boom and the object suspension device, the method comprising the following steps: - positioning the object suspension device above the object, - engaging the object by the object suspension device and actuating the hoist winch to lift the object, - positioning the object in an overboard position by slewing the crane housing and/ or actuating the luffing device, - lowering the object into the sea by actuating the hoist winch, - enlarging the angle between the first and second suspension cable parts. - positioning the object suspension device above the object, - engaging the object by the object suspension device and actuating the hoist winch to lift the object, - positioning the object in an overboard position by slewing the crane housing and/ or actuating the luffing device, - lowering the object into the sea by actuating the hoist winch, - enlarging the angle between the first and second suspension cable parts.