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1. (WO2017095334) DRILLING TENDER UNIT
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CLAIMS

1. An offshore drilling tender unit comprising:

at least two elongated pontoon hulls disposed parallel to and spaced apart side-by-side in relation to one another;

a deck box having an upper surface and a lower surface, wherein the deck box is arranged and supported onto the at least two elongated pontoon hulls such that one of the elongated pontoon hulls is disposed at a first longitudinal edge of the deck box and another one of the elongated pontoon hulls is disposed at a second longitudinal edge of the deck box, opposite the first longitudinal edge of the deck box; and

means for ballasting the drilling tender unit when required, to adjust a draft between a relatively low draft condition and a relatively high draft condition, wherein the means for ballasting are provided in each of the elongated pontoon hulls.

2. The offshore drilling tender unit according to claim 1 , wherein the drilling tender unit comprises three elongated pontoon hulls, with the third elongated pontoon hull disposed between the two elongated pontoon hulls and at the center of the lower surface of the deck box, and equal distant from the two elongated pontoon hulls.

3. The offshore drilling tender unit according to claim 1 , wherein each of the elongated pontoon hulls having, over the entire length, a substantially trapezoidal cross-section, with a longest edge in contact with the lower surface of the deck box.

4. The offshore drilling tender unit according to claim 2, wherein the third elongated pontoon hull having, over the entire length, a substantially triangular cross-section, with its base in contact with the lower surface of the deck box.

5. The offshore drilling tender unit according to claim 1 , wherein the means for ballasting include means for adjusting trim and list of the drilling tender unit.

6. The offshore drilling tender unit according to any one of the preceding claims, wherein the drilling tender unit is a drilling tender barge.

7. The offshore drilling tender unit according to any one of claims 1 -5, wherein the drilling tender unit is a semi-submersible drilling tender.